[GaryU.]

Here's a number/alphabet code from a generator. Partially under a cut-out so earlier than 1940 and I used to have a link with a date code but can't find it now. The letter indicated the year,the number indicated the month. Think "T" stood for 1940, "S" for 1939, but need some help. Don't know when it started or ended. Hope I'm not mucking up the waters too much.