OldTicker
Posted October 29, 2012 - 7:38pm
I only show the AA "YY" as taking the GS CMY312-18 crystal which is 24.2 X 22.8mm in the 1952 catalog.
I do show a CMY312-6 in the 1966 catalog fitting a AA, no variant listed, and it is a smaller crystal, 24.0 x 22.7mm
I would go with a tentative AA, but not the "YY"