See photos for Bulova #16 Interchangeable Parts Compatible Caliber if yours is not listed.
CALIBRES THAT WORK WITH EACH MOVEMENT (choose movement group number above)
5AH = 5AD
5AB = 5AC - 5AF
6BPA = 6BP - 6CHAC
7AM = 7AD - 7ADC - 7AF - 7AL - 7ALC - 7AMC - 7ASC - 7AW - 7AWC - 7BS - 7BSC - 7BUC - 7WM - 7WMC - 7WS - 7WSC
7BEAC = ONLY
8AE = 8AC
10BRC = 9AR - 9ARC - 9AS - 9ASC - 10CMC - 10CSC
10BUC = 10BC - 10BCC - 10BS - 10BT - 10BTC - 10BU - 10UT - 10ZC - 10ZCC - 10ZOC
11AC = 11ACAC - 11ACC - 10BOAC - 10BPAC - 10BPAD - 10CBAC