I have a 5AD Case R13378 Date code M0. Doesn't work. I would really like to get it working. No local watch repair that I trust. Inside mvmt is almost pristine. 10k Rolled gold. Any chance there's someone who can help me?
1956 (L6) - 23 Jewels
1960 (M0) - 23 Jewels
1954 17 Jewel 5AD example provided by GVP. Date code on mvnt confirmed L4
earliest 5AD in watch records is for 21 jewel dated L1.