 |
2019
No. 12 |
1 kg stainless steel mass standard, No. 1kr2 |
NMIM, Malaysia |
No. 11 |
1 kg stainless steel mass standard, No. M1 |
NMIM, Malaysia |
No. 10 |
1 kg stainless steel mass standard, No. LM-043 |
MIRS, Slovenia |
No. 9 |
1 kg stainless steel mass standard, No. LM-042 |
MIRS, Slovenia |
No. 8 |
1 kg stainless steel mass standard, No. LM-040 |
MIRS, Slovenia |
No. 7 |
1 kg stainless steel mass standard, No. PTB48 |
INTI, Argentina |
No. 6 |
1 kg stainless steel mass standard, No. K30 |
INTI, Argentina |
No. 5 |
1 kg stainless steel mass standard, No. MP070 |
INMETRO, Brazil |
No. 4 |
1 kg stainless steel mass standard, Np. MP060 |
INMETRO, Brazil |
No. 3 |
1 kg mass prototype, No. 66 |
Brazil |
No. 2 |
1 kg mass prototype, No. 18 |
United Kingdom |
No. 1 |
1 kg mass prototype, No. 55 |
Germany |
2018
No. 41 |
1 kg mass standard, 4S2 |
VSL, Netherlands |
No. 40 |
1 kg mass standard, 3S2 |
VSL, Netherlands |
No. 39 |
1 kg mass prototype, No. 16 |
Hungary |
No. 11 |
1 kg mass standard, No. 33 |
DMDM, Serbia |
No. 10 |
1 kg mass standard, No. P120684 |
HMI, Croatia |
No. 9 |
1 kg mass standard, No. P0296 |
HMI, Croatia |
No. 8 |
1 kg mass standard, No. 013504/00 |
EIM, Greece |
No. 7 |
1 kg mass standard, No. 013501/00 |
EIM, Greece |
No. 6 |
1 kg mass standard, No. 112492 |
RCM-LIPI, Indonesia |
No. 5 |
1 kg mass standard, No. 75 |
RCM-LIPI, Indonesia |
No. 4 |
1 kg mass standard, No. 74 |
RCM-LIPI, Indonesia |
No. 3 |
1 kg mass standard, No. 1950507 |
LATU, Uruguay |
No. 2 |
1 kg mass standard, No. ID142131 |
EMI, United Arab Emirates |
No. 1 |
1 kg mass standard, No. ID142130 |
EMI, United Arab Emirates |
2017
2016
No. 74 |
1 kg mass prototype, No. 110 |
China |
No. 73 |
1 kg mass standard, "LM-043" |
MIRS, Slovenia |
No. 72 |
1 kg mass standard, "LM-042" |
MIRS, Slovenia |
No. 71 |
1 kg mass standard, "LM-040" |
MIRS, Slovenia |
No. 70 |
1 kg mass standard, "NSCCL" |
CESMEC, Chile |
No. 69 |
1 kg mass standard, "4S2" |
VSL, Netherlands |
No. 68 |
1 kg mass standard, "3S2" |
VSL, Netherlands |
No. 67 |
1 kg mass standard in Nicral D, "71" |
NMCI, Iran (Islamic Republic of) |
No. 66 |
1 kg mass prototype, No. 55 |
Germany |
2015
No. 131 |
1 kg mass standard in "Immaculate V", E'69 |
NSAI NML, Ireland |
No. 130 |
1 kg mass standard in platinum-iridium, "B" |
NPL, United Kingdom |
No. 129 |
1 kg mass standard, 4S2 |
VSL, Netherlands |
No. 128 |
1 kg mass standard, 3S2 |
VSL, Netherlands |
No. 127 |
1 kg mass prototype, No. 108 |
Colombia |
No. 126 |
1 kg mass prototype, No. 76 |
Italy |
No. 125 |
1 kg mass prototype, No. 48 |
Denmark |
No. 124 |
1 kg mass prototype, No. 64 |
China |
No. 123 |
1 kg mass standards, E0 |
NIMT, Thailand |
No. 122 |
1 kg mass prototype, No. 80 |
Thailand |
No. 121 |
1 kg mass prototype, No. 24 |
Spain |
No. 84 |
1 kg mass standard in stainless steel, T3 |
INPL, Israel |
No. 83 |
1 kg mass prototype, No. 71 |
Israel |
No. 82 |
1 kg mass prototype, No. 46 |
Indonesia |
No. 81 |
1 kg mass standard in stainless steel, 01-0706 |
LATU, Uruguay |
No. 80 |
1 kg mass standard in stainless steel, KZ3 |
KazInMetr, Kazakhstan |
No. 79 |
1 kg mass standard in stainless steel, KZ2 |
KazInMetr, Kazakhstan |
No. 78 |
1 kg mass standard in stainless steel, KZ1 |
KazIMetr, Kazakhstan |
No. 77 |
1 kg mass prototype, No. 56 |
South Africa |
No. 76 |
1 kg mass prototype, No. 78 |
CMI, Chinese Taipei |
No. 75 |
1 kg mass prototype, No. 93 |
Saudi Arabia |
No. 74 |
Prototype de masse, No. 35 |
France |
No. 73 |
1 kg mass prototype, No. 89 |
Switzerland |
No. 72 |
1 kg mass standard in stainless steel, No. 11116701 |
BIM, Bulgaria |
No. 71 |
1 kg mass standard in platinum-iridium, "A" |
NPL, United Kingdom |
No. 70 |
1 kg mass prototype, No. 44 |
Australia |
No. 69 |
1 kg mass standard, 4S2 |
VSL, Netherlands |
No. 68 |
1 kg mass standard, 3S2 |
VSL, Netherlands |
No. 67 |
Prototype de masse, No. 34 |
Académie des sciences de Paris, France |
No. 28 |
1 kg mass standard, S |
MSL, New Zealand |
No. 27 |
1 kg mass standard in platinum-iridium "JM15" |
Conservatoire national des arts et métiers, France |
No. 26 |
1 kg mass standard in platinum-iridium "E59" |
NMIJ/AIST, Japan |
No. 25 |
1 kg mass prototype, No. 94 |
Japan |
No. 24 |
1 kg mass prototype, No. 78 |
United States of America |
No. 23 |
1 kg mass prototype, No. 74 |
Canada |
No. 22 |
1 kg mass prototype, No. 60 |
China |
No. 21 |
1 kg mass prototype, No. 55 |
Germany |
No. 20 |
1 kg mass prototype, No. 38 |
Switzerland |
No. 19 |
1 kg mass prototype, No. 20 |
United States of America |
No. 18 |
1 kg mass prototype, No. 17 |
France |
No. 17 |
1 kg mass prototype, No. 106 |
NRC, Canada |
2014
No. 55 |
1 kg mass prototype, No. 105 |
NIST, United States of America |
No. 54 |
1 kg mass prototype, No. 104 |
NIST, United States of America |
No. 53 |
1 kg mass prototype, No. 102 |
NIST, United States of America |
No. 24 |
1 kg mass prototype, No. 12 |
Russian Federation |
No. 23 |
1 kg mass standard, 4S2 |
VSL, Netherlands |
No. 22 |
1 kg mass standard, 3S2 |
VSL, Netherlands |
No. 21 |
1 kg mass standard in stainless steel, No. 116478 |
IPQ, Portugal |
No. 20 |
1 kg mass standard in stainless steel, No. 116476 |
IPQ, Portugal |
No. 19 |
1 kg mass standard in stainless steel, No. 116475 |
IPQ, Portugal |
No. 18 |
1 kg mass standard in stainless steel, No. 1950507 |
LATU, Uruguay |
2013
No. 73 |
1 kg mass standard in stainless steel, 1Kr |
NML-SIRIM, Malaysia |
No. 72 |
1 kg mass standard in stainless steel, 1K4 |
NML-SIRIM, Malaysia |
No. 71 |
1 kg mass standard "A" in platinum-iridium |
NPL, United Kingdom |
No. 70 |
1 kg mass prototype, No. 70 |
Germany |
No. 69 |
1 kg mass standard in stainless steel, No. 81 |
INM, Romania |
No. 68 |
1 kg mass prototype, No. 2 |
Romania |
No. 48 |
1 kg mass prototype, No. 3 |
Spain |
No. 47 |
1 kg mass prototype, No. 4 |
United States of America |
No. 46 |
1 kg mass standard, 1Kc |
NML-SIRIM, Malaysia |
No. 45 |
1 kg mass standard, 1K3 |
NML-SIRIM, Malaysia |
2012
No. 61 |
1 kg mass standard, 4S2 |
VSL, Netherlands |
No. 60 |
1 kg mass standard, 3S2 |
VSL, Netherlands |
No. 55 |
1 kg mass standard, K30 |
INTI, Argentina |
No. 54 |
1 kg mass standard, No. 48 |
INTI, Argentina |
No. 53 |
1 kg mass standard, 013504/00 |
EIM, Greece |
No. 52 |
1 kg mass standard, 013501/00 |
EIM, Greece |
No. 44 |
1 kg mass standard, P41205001 |
HMI, Croatia |
No. 43 |
1 kg mass standard, P41204998 |
HMI, Croatia |
No. 42 |
1 kg mass standard, P120684 |
HMI, Croatia |
No. 41 |
1 kg mass standard, P0296 |
HMI, Croatia |
No. 40 |
1 kg mass prototype, No. 57 |
India |
No. 30 |
1 kg mass prototype, No. 85 |
United States of America |
No. 25 |
1 kg mass standard in stainless steel, No. 112492 |
KIM-LIPI, Indonesia |
No. 24 |
1 kg mass standard in stainless steel, No. 112491 |
KIM-LIPI, Indonesia |
No. 23 |
1 kg mass standard in stainless steel, No. 74 |
KIM-LIPI, Indonesia |
No. 16 |
1 kg mass standard, MP4 |
CEM, Spain |
No. 15 |
1 kg mass prototype, No. 72 |
Korea (Republic of) |
No. 6 |
1 kg mass standard, NSCCL |
CESMEC, Chile |
No. 5 |
1 kg mass standard, SMD1+ |
SMD-ENS, SPF Economie, Belgium |
No. 4 |
1 kg mass prototype, No. 79 |
United States of America |
No. 3 |
1 kg mass prototype, No. 48 |
Denmark |
No. 2 |
1 kg mass standard in stainless steel, 4S2 |
VSL, Netherlands |
No. 1 |
1 kg mass standard in stainless steel, 3S2 |
VSL, Netherlands |
2011
No. 98 |
1 kg mass standard in stainless steel, E |
NMC, A*STAR, Singapore |
No. 97 |
1 kg mass standard in stainless steel, D |
NMC, A*STAR, Singapore |
No. 96 |
1 kg mass standard in stainless steel, C |
NMC, A*STAR, Singapore |
No. 95 |
1 kg mass prototype, No. 4 |
United States of America |
No. 94 |
1 kg mass prototype, No. 96 |
Mexico |
No. 93 |
1 kg mass prototype, No. 23 |
Finland |
No. 58 |
1 kg mass standard in stainless steel, 01-0706 |
LATU, Uruguay |
No. 57 |
1 kg mass prototype, No. 95 |
Kenya |
No. 43 |
1 kg mass standard in stainless steel, MS-S-14 |
Justervesenet, Norway |
No. 42 |
1 kg mass standard in stainless steel, LMN5 |
Justervesenet, Norway |
No. 41 |
1 kg mass prototype, No. 36 |
Norway |
No. 7 |
1 kg mass standard in stainless steel, S |
MSL, New Zealand |
No. 6 |
1 kg mass standard in stainless steel, 4S2 |
VSL, Netherlands |
No. 5 |
1 kg mass standard in stainless steel, 3S2 |
VSL, Netherlands |
No. 4 |
1 kg mass prototype, No. 92 |
United States of America |
No. 3 |
1 kg mass prototype, No. 20 |
United States of America |
No. 2 |
1 kg mass prototype, No. 74 |
Canada |
No. 1 |
1 kg mass prototype, No. 58 |
Egypt |
2010
No. 60 |
Volume Magnetic Susceptibility of Sample, AR-Alac |
INTI, Argentina |
No. 59 |
Volume Magnetic Susceptibility of Sample, AR-Ti |
INTI, Argentina |
No. 50 |
1 kg mass standard in stainless steel, No. 11116701 |
BIM, Bulgaria |
No. 43 |
1 kg mass standard in stainless steel, E1 |
NIS, Egypt |
No. 42 |
1 kg mass standard in stainless steel, A |
NIS, Egypt |
No. 41 |
1 kg mass standard in stainless steel, C2 |
NIMT, Thailand |
No. 40 |
1 kg mass standard in stainless steel, C1 |
NIMT, Thailand |
No. 39 |
1 kg mass standard in stainless steel, E0 |
NIMT, Thailand |
No. 28 |
1 kg mass standard in stainless steel, KZ3 |
KazInMetr, Kazakhstan |
No. 27 |
1 kg mass standard in stainless steel, KZ2 |
KazInMetr, Kazakhstan |
No. 26 |
1 kg mass standard in stainless steel, KZ1 |
KazInMetr, Kazakhstan |
No. 25 |
1 kg mass standard in stainless steel, TLT |
MSL, New Zealand |
No. 24 |
1 kg mass standard in stainless steel, S |
MSL, New Zealand |
No. 23 |
1 kg mass standard in stainless steel, No. 83700 |
NMC, A*STAR, Singapore |
No. 22 |
1 kg mass prototype, No. 83 |
Singapore |
No. 21 |
1 kg mass prototype, No. 52 |
Germany |
2009
No. 85 |
Volume magnetic susceptibility of sample, P17 1kg D |
MIKES, Finland |
No. 61 |
1 kg mass standard, 1kr2 |
NML-SIRIM, Malaysia |
No. 60 |
1 kg mass standard, 1K1 |
NML-SIRIM, Malaysia |
No. 59 |
1 kg mass prototype, No. 94 |
Japan |
No. 58 |
1 kg mass prototype, No. 64 |
China |
No. 57 |
1 kg mass prototype, No. 60 |
China |
No. 51 |
1 kg mass prototype, No. 67 |
Czechia |
No. 50 |
1 kg mass prototype, No. 21 |
Mexico |
No. 49 |
1 kg mass standard, "4S2" |
VSL, Netherlands |
No. 48 |
1 kg mass standard, "3S2" |
VSL, Netherlands |
No. 40 |
1 kg mass prototype, No. 49 |
Austria |
No. 34 |
1 kg mass standard, MP060 |
INMETRO, Brazil |
No. 33 |
1 kg mass prototype, No. 66 |
Brazil |
No. 32 |
1 kg mass standard in stainless steel, No. 83700 |
NMC, A*STAR, Singapore |
No. 31 |
1 kg mass prototype, No. 55 |
Germany |
No. 30 |
1 kg mass standard in stainless steel, MP3 |
CEM, Spain |
2008
No. 58 |
Prototype de masse, n° 69 |
Portugal |
No. 57 |
Prototype de masse, n° 92 |
United States of America |
No. 56 |
Prototype de masse, n° 55 |
Germany |
No. 43 |
1 kg mass standard, "1S1(A)" |
NMi-VSL, Netherlands |
No. 42 |
1 kg mass standard, "2S1(3)" |
NMi-VSL, Netherlands |
No. 41 |
1 kg mass standard, "2S2(2)" |
NMi-VSL, Netherlands |
No. 40 |
1 kg mass standard, "1S2(1)" |
NMi-VSL, Netherlands |
No. 39 |
1 kg mass standard in stainless steel, NPSL-1kg-E1 |
NPSL, Pakistan |
No. 38 |
1 kg mass standard in "Immaculate V", No. E'69 |
NML, Ireland |
No. 37 |
1 kg mass standard in stainless steel, No. 1950507 |
LATU, Uruguay |
2007
No. 86 |
1 kg mass standard in stainless steel, No. 112493 |
KIM-LIPI, Indonesia |
No. 85 |
1 kg mass standard in stainless steel, No. 112492 |
KIM-LIPI, Indonesia |
No. 84 |
1 kg mass standard in stainless steel, No. 112491 |
KIM-LIPI, Indonesia |
No. 83 |
Volume Magnetic Susceptibility of sample, KL-Ti |
KIM-LIPI, Indonesia |
No. 82 |
Volume Magnetic Susceptibility of sample, KL-Alac |
KIM-LIPI, Indonesia |
No. 58 |
Prototype de masse, n° 16 |
Hungary |
No. 56 |
1 kg mass standard in stainless steel, No. 83700 |
SPRING, Singapore |
No. 55 |
Prototype de masse, n° 83 |
Singapore |
No. 42 |
Prototype de masse, no 72 |
Korea (Republic of) |
No. 41 |
Prototype de masse, no 48 |
Denmark |
No. 20 |
1 kg mass standard in stainless steel, No. 33 |
ZMDM, Serbia |
No. 2 |
Volume magnetic susceptibility of sample, EIM-Ti |
EIM, Greece |
No. 1 |
Volume magnetic susceptibility of sample, EIM-Alac |
EIM, Greece |
2006
No. 55 |
1 kg mass standard in stainless steel, No. 1kr |
NMIM, Malaysia |
No. 54 |
1 kg mass standard in stainless steel, No. 1K3 |
NMIM, Malaysia |
No. 28 |
1 kg mass standard in stainless steel, PTB47 |
INTI, Argentina |
No. 27 |
1 kg mass standard in stainless steel, K30 |
INTI, Argentina |
No. 23 |
1 kg mass standard in stainless steel, 013504/00 |
EIM, Greece |
No. 13 |
1 kg mass standard in stainless steel, 1kr2 |
NML-SIRIM, Malaysia |
No. 12 |
1kg mass standard in stainless steel, 1K4 |
NML-SIRIM, Malaysia |
No. 11 |
Prototype de masse, no 76 |
Italy |
No. 10 |
Prototype de masse, no 49 |
Austria |
No. 9 |
Prototype de masse, no 28 |
Belgium |
2005
No. 96 |
1 kg mass standard in stainless steel, No. 013501/00 |
EIM, Greece |
No. 91 |
Étalon de masse de 1 kg en acier inxoydable, no 81 |
INM, Romania |
No. 90 |
Prototype de masse, no 2 |
Romania |
No. 89 |
Prototype de masse, no 44 |
Australia |
No. 88 |
Prototype de masse, 56 |
South Africa |
No. 79 |
Prototype de masse, 75 |
SCL, Hong Kong (China) |
No. 78 |
Étalon de masse de 1 kg en acier inoxydable, (SMB) 1 |
Belgium |
No. 73 |
1 kg mass standard in stainless steel, S |
MSL, New Zealand |
No. 72 |
Prototype de masse, 3 |
Spain |
No. 71 |
1 kg mass standard in stainless steel, 1S2(2) |
NMi-VSL, Netherlands |
No. 70 |
1 kg mass standard in stainless steel, 1S2(1) |
NMi-VSL, Netherlands |
No. 69 |
Prototype de masse, 78 |
CMS, Chinese Taipei |
No. 68 |
1 kg mass prototype, 46 |
Indonesia |
No. 6 |
1 kg mass standard in stainless steel, No. 83700 |
SPRING, Singapore |
No. 5 |
1 kg mass standard in stainless steel, C2 |
NIMT, Thailand |
No. 4 |
1 kg mass standard in stainless steel, C1 |
NIMT, Thailand |
No. 3 |
1 kg mass standard in stainless steel, E0 |
NIMT, Thailand |
No. 2 |
Prototype de masse, no 90 |
Mexico |
No. 1 |
Prototype de masse, no 89 |
Switzerland |
2004
No. 92 |
1 kg mass standard in stainless steel, No. 15 |
METAS, Switzerland |
No. 91 |
1 kg mass standard in stainless steel, No. 14 |
METAS, Switzerland |
No. 90 |
1 kg mass standard in stainless steel, No. 40503314 |
NCM, Bulgaria |
No. 89 |
1 kg mass standard in stainless steel, No. 1 |
MT, Switzerland |
No. 77 |
Prototype de masse, no 87 |
Australia |
No. 72 |
Volume magnetic susceptibility of sample, CEM-A |
CEM, Spain |
No. 69 |
Prototype de masse, no 80 |
Thailand |
No. 68 |
Prototype de masse, no 86 |
Sweden |
No. 42 |
Volume magnetic susceptibility, NML-Ti |
NMIA, Australia |
No. 41 |
Volume magnetic susceptibility, NML-Alac |
NMIA, Australia |
No. 22 |
Volume magnetic susceptibility, NIM-Ti |
NIM, China |
No. 21 |
Volume magnetic susceptibility, NIM-A1ac |
NIM, China |
No. 20 |
Prototype de masse, no 82 |
United Kingdom |
2003
No. 78 |
1 kg mass standard in stainless steel, No. M001 |
NMIM, Malaysia |
No. 74 |
1 kg mass standard in stainless steel, No. T 4 |
NMIJ AIST, Japan |
No. 72 |
Susceptibilité magnétique volumique, LNE 03 |
LNE, France |
No. 70 |
Prototype de masse, no 85 |
United States of America |
No. 66 |
Prototype de masse, no 38 |
Switzerland |
No. 57 |
Prototype de masse, no 53 |
Netherlands |
No. 56 |
Prototype de masse, no 65 |
Slovakia |
No. 53 |
Prototype de masse, no 84 |
Korea (Republic of) |
No. 52 |
Prototype de masse, no 83 |
Singapore |
No. 34 |
1 kg mass standard in platinum-iridium, No. "A" |
NPL, United Kingdom |
No. 33 |
Prototype de masse, no 55 |
Germany |
No. 11 |
Prototype de masse, no 57 |
India |
2002
No. 90 |
1 kg mass standard in "Nicral D", No. SASO 1 |
SASO, Saudi Arabia |
No. 71 |
Prototype de masse, no 72 |
Korea (Republic of) |
No. 70 |
1 kg mass standard in "Immaculate V", No. E'69 |
NML, Ireland |
No. 65 |
1 kg mass standard in stainless steel, No. IRMM-15918 |
IRMM |
No. 43 |
Prototype de masse, no 70 |
Germany |
No. 42 |
Prototype de masse, no 35 |
France |
No. 12 |
Prototype de masse, no 58 |
Egypt |
No. 11 |
1 kg mass standard in stainless steel, No. 8 |
CSIR-NML, South Africa |
No. 1 |
1 kg mass standard in stainless steel, No. 85380 |
PSB, Singapore |
2001
No. 84 |
Prototype de masse, no 74 |
Canada |
No. 61 |
Prototype de masse, no 48 |
Denmark |
No. 59 |
Prototype de masse, no 24 |
Spain |
No. 58 |
Prototype de masse, no 23 |
Finland |
No. 57 |
1 kg mass standard in stainless steel, LPN-00-07 |
CENAM, Mexico |
No. 56 |
1 kg mass standard in stainless steel, LPN-00-02 |
CENAM, Mexico |
No. 55 |
Prototype de masse, no 21 |
Mexico |
No. 15 |
Prototype de masse, no 36 |
Norway |
No. 14 |
1 kg mass standard in stainless steel, LMN5 |
Justervesenet, Norway |
No. 13 |
1 kg mass standard in stainless steel, LMN1 |
Justervesenet, Norway |
No. 12 |
1 kg mass standard in stainless steel, MS-S-14 |
Justervesenet, Norway |
No. 3 |
1 kg mass standard in stainless steel, No. 83700 |
PSB, Singapore |
No. 2 |
1 kg mass standard in platinum-iridium, No. "A" |
NPL, United Kingdom |
No. 1 |
Prototype de masse, no 55 |
Germany |
2000
No. 25 |
1 kg mass standard in stainless steel, MP3 |
CEM, Spain |
No. 24 |
1 kg mass standard in stainless steel, No. 48 |
INTI, Argentina |
No. 23 |
1 kg mass standard in stainless steel, K30 |
INTI, Argentina |
No. 22 |
Prototype de masse, no 20 |
United States of America |
No. 21 |
Prototype de masse, no 4 |
United States of America |
No. 20 |
1 kg mass standard in stainless steel, No. 2188 |
LATU, Uruguay |
No. 19 |
1 kg mass standard in stainless steel, Mettler-S |
MSL-IRL, New Zealand |
No. 9 |
1 kg mass standard in stainless steel, NSCCL |
CESMEC, Chile |
No. 8 |
Prototype de masse, no 76 |
Italy |
No. 7 |
Prototype de masse, no 67 |
Czechia |
Study Notes
2015
No. 5 |
1 kg mass prototype, No. 109 |
PTB, Germany |
2010
No. 3 |
1 kg mass standard in stainless steel, E0 |
NIS, Egypt |
2009
No. 2 |
Étalon de masse de 500 g en platine iridié, "W2" |
LNE-INM/Cnam, France |
No. 1 |
Étalon de masse de 500 g en platine iridié, "W1" |
LNE-INM/Cnam, France |
2008
2003
No. 1 |
1 kg mass standard in platinum-iridium, No. 651 |
NPL, United Kingdom |
2001
No. 4 |
Four 1 kg mass standards in stainless steel, E4, E5, E6, E7 |
SMU, Slovakia |
No. 1 |
1 kg mass standard in platinum-iridium, No. 651 |
NPL, United Kingdom |
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Traceability to the SI through the BIPM |
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