| Country | Catalog Number | Type of Item | Year of Issue | Notes on Content |
|---|
| Metric system (SI) |
|---|
| Algeria | 1727 (Mi1872) | | 2017 | 31st anniv. National Office of Legal Metrology, 1986: SI base units |
| Algeria | 1727 fdc | Stamp and (pictorial) cancel and (Algeria Post) cachet on FDC
|
| Algeria | 1727 folder | Folder
|
| Australia | 541 (Mi513) | | 1973 | conversion to metric system: (kg/stones-and-pounds) mass, scale |
| Australia | 542 (Mi514) | | conversion to metric system: (°C/°F) temperature, fever |
| Australia | 543 (Mi515) | | conversion to metric system: (cm/feet-and-inches) length, tape measure |
| Australia | 544 (Mi516) | | conversion to metric system: (mL/fluid-ounces) volume, drinking glass |
| Australia | 541-544 fdc1 | Four stamps and (yellow and orange and pink and green printed) cachet on FDC | conversion to metric system |
| Australia | 541-544 fdc2 | Four stamps and (green and orange and black printed) cachet on FDC
|
| Bangladesh | 212 (Mi177) | | 1983 | metric system: mail scale |
| Bangladesh | 213 (Mi178) | | metric system: weights, measures |
| Brazil | 940 (Mi1018) | | 1962 | 100th anniv. introduction of metric system, 1862: millimeter gauge |
| Cuba | 2173 (Mi2268) | | 1977 | SI (metric system) system: 7 (seven) SI base units, map |
| Denmark | 1388 (Mi1476) | | 2007 | 100th anniv. metric system in Denmark |
| Estonia | 897 (Mi957) | Stamp and slevedge, from MS25 (897a (25x 897)) | 2019 | New SI base units and fundamental constants logo |
| Estonia | 897 fdc | Stamp and (pictorial) cancel and (multi-color printed) cachet on FDC
|
| Finland | 750 (Mi1010) | | 1987 | 100th anniv. use of metric system, 1887: X-cross section of standard meter bar |
| Finland | 750 fdc | Stamp and (blue and black printed) cachet on FDC
|
| France | 732 (Mi1024) | | 1954 | metric system introduction in France first: allegory |
| France | 869 fdc (Mi1182 fdc) | (Éditions J.F.) cachet on FDC | 1958 | "participated in the establishment of the metric system" (in French text) |
| France | 1435 (Mi1921) | | 1975 | 100th anniv. International Metre Convention, 1875: document, krypton atom, waves |
| France | 1435 fdc1 | Stamp and (pictorial) cancel and (Éditions J.F.) cachet on FDC
|
| France | 1435 fdc2 | Stamp and (pictorial) cancel and (Éditions P.J.) cachet on FDC
|
| France | 1435 sc | Souvenir card
|
| Ghana | 570 (Mi630) | | 1976 | introduction of metric system, 1975-09: liter, water |
| Ghana | 571 (Mi631) | | introduction of metric system, 1975-09: kilogram, jam |
| Ghana | 572 (Mi632) | | introduction of metric system, 1975-09: meter, cloth |
| Ghana | 573 (Mi633) | | introduction of metric system, 1975-09: (°C) fever thermometer, ice, boiling tea kettle |
| Guinea Republic | BL1696 | In (upper-right) margin of SS1 | 2009 | "The name "Pascal" was given to the pressure unit in the SI system of units" (in French text) |
| Guyana | 437a (Mi726) | From MS6 (437 (a-f)) (BL11) | 1982 | conversion to metric system, 1982-01-02: tape measure, truck |
| Guyana | 437b (Mi727) | conversion to metric system, 1982-01-02: juggler, unit symbols (°C) |
| Guyana | 437c (Mi728) | conversion to metric system, 1982-01-02: man, envelope |
| Guyana | 437d (Mi729) | conversion to metric system, 1982-01-02: woman, baby, scale |
| Guyana | 437e (Mi730) | conversion to metric system, 1982-01-02: Canje bridge (530 m long) |
| Guyana | 437f (Mi731) | conversion to metric system, 1982-01-02: liter bucket |
| Guyana | 557a (Mi870) | From MS6 (557 (a-f)), 437 (a-f) overprinted (BL12) | 1982 | conversion to metric system, 1982-01-02: tape measure, truck |
| Guyana | 557b (Mi871) | conversion to metric system, 1982-01-02: juggler, unit symbols (°C) |
| Guyana | 557c (Mi872) | conversion to metric system, 1982-01-02: man, envelope |
| Guyana | 557d (Mi873) | conversion to metric system, 1982-01-02: woman, baby, scale |
| Guyana | 557e (Mi874) | conversion to metric system, 1982-01-02: Canje bridge (530 m long) |
| Guyana | 557f (Mi875) | conversion to metric system, 1982-01-02: liter bucket |
| Hungary | 2418 (Mi3115) | | 1976 | 100th anniv. introduction of metric system, 1876: X-cross section standard meter bar, meter act |
| Hungary | 2419 (Mi3116) | | 100th anniv. introduction of metric system, 1876: standard kilogram cylinder |
| Hungary | 2420 (Mi3117) | | 100th anniv. introduction of metric system, 1876: interferometer, rocket |
| Italy | 1809 (Mi2147) | | 1990 | 55th anniv. metric system in Italy, 1935: MKS, Giovanni Giorgi |
| Japan | 673 (Mi705) | | 1959 | adoption of metric system: measuring glass, tape measure, scales |
| Japan | 673 fdc1 | Stamp and (pictorial) cancel and (Watanabe) cachet on FDC, also insert
|
| Japan | 673 fdc2 | Stamp and (pictorial) cancel and (?) cachet on FDC
|
| Japan | 673 fdc3 | Stamp and (pictorial) cancel and (?) cachet on FDC
|
| Japan | 673 fdc4 | Stamp and (pictorial) cancel and (?) cachet on postcard FDC
|
| Japan | 673 fdc5 | Stamp and (pictorial) cancel and (?) cachet on FDC
|
| Japan | 673 fdc6 | Stamp and (pictorial) cancel and (JPS) cachet on FDC
|
| Kenya, Uganda, and Tanzania | 225 (Mi213) | | 1971 | conversion to metric system: kilogram/pounds, pan balance |
| Kenya, Uganda, and Tanzania | 226 (Mi214) | | conversion to metric system: two (°C/°F) thermometers |
| Kenya, Uganda, and Tanzania | 227 (Mi215) | | conversion to metric system: liters, petrol |
| Kenya, Uganda, and Tanzania | 228 (Mi216) | | conversion to metric system: kilometers, surveyors |
| Kenya, Uganda, and Tanzania | 225-228 fdc1 | Four stamps and (East African Posts and Telecommunications) cachet on FDC (Nairobi Stamp Bureau cancel) | conversion to metric system |
| Kenya, Uganda, and Tanzania | 225-228 fdc2 | Four stamps and (East African Posts and Telecommunications) cachet on FDC (Nairobi cancel)
|
| Korea (South) | 428 (Mi416) | | 1964 | introduction of metric system: metric unit symbols ("kg" incorrectly given as "Kg") |
| Korea (South) | 2546 (Mi3380) | From MS16 (MS16 (16x 2546)) | 2019 | New SI base units and fundamental constants logo |
| Korea (South) | 2546 fdc | Stamp(s) and (pictorial) cancel(s) on FDC
|
| Korea (South) | 2546 folder | FDC folder
|
| Mexico | C241 (Mi1077) | From MS50 (C241a (10x C241)) | 1957 | 100th anniv. adoption of metric system, 1857: measures, globe |
| Mexico | C241 fdc1 | Stamp and (blue and black printed) cachet (same design as stamp) on (airmail) FDC
|
| Mexico | C241 fdc2 | Stamp on FDC (blank/no cachet)
|
| Mexico | 2967 (Mi3953) | | 2015 | 125th anniv. acceptance of Treaty of the Meter in Mexico, 1890: measures, globe |
| Mexico | 2967 fdc1 | Stamp and (pictorial) cancel and (purple and black printed) cachet (design like stamp) on FDC
|
| Mexico | 2967 sc | Souvenir card (2967)
|
| New Zealand | 594 (Mi677) | | 1976 | metric conversion, 1976: symbolic measures: weight, length, temperature (unscaled) thermometer |
| Nigeria | 394 (Mi377) | | 1980 | World Standards Day: kilogram scale, centimeter ruler, emblem |
| Pakistan | 364 (Mi367) | | 1974 | introduction of metric system: metric measures |
| Poland | None | Postal card | 1979 | 60th anniv. Measurement Service, 1919: standards, SI units |
| Poland | None | Postal card | 2019 | 100th anniv. Measurement Service, 1919: SI units |
| Romania | 1873 (Mi2533) | | 1966 | 100th anniv. introduction of metric system, 1866: derivation meter |
| Romania | 1874 (Mi2534) | | 100th anniv. introduction of metric system, 1866: metric unit symbols |
| Russia | 8037 (Mi2713) | From MS9 (8037a (9x 8037)) | 2019 | "International system of units" (in Cyrillic text); new SI base units and fundamental constants logo (in FDC cachet) |
| Russia | 8037 fdc | Stamp and (pictorial) cancel and (multi-color printed) cachet on FDC
|
| Singapore | 316 (Mi322) | | 1979 | introduction of metric system: distance, kilometer |
| Singapore | 317 (Mi323) | | introduction of metric system: tape measure, centimeter |
| Singapore | 318 (Mi324) | | introduction of metric system: scale, kilogram |
| Singapore | 316-318 fdc | Three stamps and (blue printed) cachet on FDC | introduction of metric system |
| Slovenia | 1324 (Mi1362) | | 2019 | New SI base units and fundamental constants logo |
| Slovenia | 1324 fdc | Stamp and (pictorial) cancel and (Slovenia Post) cachet on FDC
|
| South Africa | 497 (Mi534) | | 1977 | introduction of metric system: world map, "M": 10th anniv. Metric Advisory Board, 1967 |
| South Africa | 497 fdc | Stamp and (pictorial) cancel and (blue and black printed) cachet on FDC
|
| Sri Lanka | 2109+label (Mi2173+label) | Label with (year 2017) stamp | 2019-10-16 | "World Metrology Day - 2019" (New SI base units and fundamental constants logo) |
| Sri Lanka | 2109+label fdc | Label with stamp and (text) cancel and (Sri Lanka Post) cachet on FDC
|
| Tonga | 449 (Mi701) | | 1979 | introduction of metric system: decade of progress |
| United States | None | (MSFC Station) cancel on cover (Colorano silk cachet) | 1985 | USMA-NASA Metric Conference, Huntsville AL |
| United States | None | (MSFC Station) cancel on cover (USMA/MSFC cachet) | 1985 | USMA-NASA Metric Conference, Huntsville AL |
| United States | None | (MSFC Station) cancel on cover (red and blue printed cachet) | 1985 | USMA-NASA Metric Conference, Huntsville AL |
| United States | None | (MSFC Station) cancel on cover (red and blue printed cachet, different) | 1985 | USMA-NASA Metric Conference, Huntsville AL |
| United States | None | (MSFC Station) cancel on cover (blank/no cachet) | 1985 | USMA-NASA Metric Conference, Huntsville AL |
| United States | None | (MSFC Station) cancel on cover (blue printed cachet) | 1985 | USMA-NASA Metric Conference, Huntsville AL |
| Yugoslavia | 1180 (Mi1538) | | 1974 | 100th anniv. introduction of metric system, 1874: measure |
| 100th Anniversary of the International Metre Convention (1875 — 1975) |
|---|
| Bulgaria | 2236 (Mi2381) | | 1975 | 100th anniv. International Metre Convention, 1875: standard kilogram cylinder, X-cross section standard meter bar |
| Bulgaria | 2236 fdc | Stamp and (text) cancel and (black printed) cachet on FDC
|
| Indonesia | 941 (Mi809) | | 1975 | 100th anniv. International Metre Convention, 1875: X-cross section standard meter bar, standard kilogram cylinder, globe |
| Indonesia | 941 fdc | Stamp and (pictorial) cancel and (brown printed) cachet on FDC
|
| Korea (South) | 975 (Mi979) | | 1975 | 100th anniv. International Metre Convention, 1875: metric unit symbols |
| Netherlands | 531 (Mi1056) | | 1975 | 100th anniv. International Metre Convention, 1875: symbolic scale |
| Norway | 655 (Mi704) | | 1975 | 100th anniv. International Metre Convention, 1875: Ole Jacob Broch |
| Romania | 2547 (Mi3263) | | 1975 | 100th anniv. International Metre Convention, 1875: emblem |
| Romania | 2547 fdc | Stamp and (text) cancel and (green and black printed) cachet on FDC
|
| Russia (USSR) | 4304 (Mi4337) | | 1975 | 100th anniv. International Metre Convention, 1875: metric unit symbols |
| Russia (USSR) | 4304 cover (Mi4337 cover) | Stamp and (pictorial) cancel and (blue and orange and black printed) cachet on cover | 1975 | 100th anniv. International Metre Convention, 20 May 1875 |
| Surinam | 421 (Mi695) | | 1975 | 100th anniv. International Metre Convention, 1875: symbolic design |
| Surinam | 422 (Mi696) |
|
| Surinam | 423 (Mi697) |
|
| Sweden | 1121 (Mi903) | | 1975 | 100th anniv. International Metre Convention, 1875: tape measure |
| Sweden | 1121-1123 fdc1 | One of three stamps and (green and black printed) cachet on FDC, also insert
|
| Sweden | 1121-1123 fdc2 | One of three stamps on FDC (blank/no cachet), also insert
|
| Switzerland | 599 (Mi1046) | | 1975 | 100th anniv. International Metre Convention, 1875: X-cross section standard meter bar, krypton spectrum |
| Switzerland | 599 fdc | Stamp and (Swiss Post) cachet on FDC
|
| Switzerland | 599-602 fdc | One of four stamps on FDC (Swiss Post cachet)
|
