UK DRAWING/JOB NUMBER - 122

Gear Ring 3½" diam.

Meccano Part No. 180 (Gear Ring 3½" diam.)

Drawing Date - 15/02/1933
The following revisions are noted on the drawing:-
Issue 2 - 01/06/1933
Issue 3 - 01/09/1944
Issue 4 - 09/08/1945
Issue 5 - 26/01/1951