Looking to replace the mainspring for my 1977 Bulova 23J 11AOACB watch. The mainspring is marked "Bulova Sealed Lifetime power do not open",
ink stamped H1, so of course I opened it and the spring is broken.
My questions are - does anyone you have the whole assembly ? or should just the spring get replaced?
According to Ranfft and other sources, the mainspring is 1.10 x 11.0 x 0.11mm.
Whole assembly or spring please :)