- 1952 - 1959 (Creation)
Level of description
Extent and medium
Name of creator
Immediate source of acquisition or transfer
Content and structure area
Scope and content
The AC/28 chronological series includes reports on the meetings of the Working Group, in which the challenges of converting the technical drawings, including measurement and projection systems, different testing standards and symbols used to represent surface finish, were discussed.
The series also includes summaries of recommendations made by the Working Group, in addition to memorandums on imperial to metric conversion scales. Though AC/28 series also consists of many cover letters for the distribution of converted drawings to the nations, the drawings themselves are not included.