JimDon5822
Posted January 14, 2026 - 2:29pm
The 10CBAC was a transitional movement for about short time between 1954-1956 and are quite rare. Your example is the only 23J 10CBAC movement we have had reported to MyBulova. All 6 others of this movement reported here are 17J and different model watches. I have no doubts the movement is original to your watch and thus making this a very rare combination. I suspect the 10BPAC was used on most of the 23J movements but a few of the 10CBAC movements were used. To date this is the first example of this movement in 23J reported here.