Do you know the first standard published by ISO (International Standards Organization)?

Iso/R 1: Do you know the first standard published by ISO (International Standards Organization)?

ISO / R 1: 1951 Reference temperature standard for industrial length measurements  is the first standard published by ISO in 1951.

The ISO / R 1: 1951 standard, which has undergone many revisions since 1951, continues to be published today as ISO 1: 2016 Geometric Product Specifications (GPS).

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