1927 Conquerer/Lone Eagle I imagine , was missing the crystal ,seconds hand and strap , which I have replaced. It has suffered a knock at some time in its career as bottom right hand lug is damaged and slightly bent but still takes a springbar and the case opens/closes as it should. Runs ok'ish but sometimes a bit temperamental . Not sure about the crown. looks too 'brassy' ?
Case could be either from the Conqueror or Lone Eagle period. The 663xxxx is correct for both.
The movement I feel is not original but period and dated to the latter half of 1927.
I'd be more inclined to ID this as a 1927 Bulova Lone Eagle than a Conqueror. This is one case (excuse the pun) when we can say for certain that cases made in 1926 were used in watches assembled and sold in 1927.
The closed 9 and later cathedral hands also move it post Conqueror.
In reply to Case could be either from… by mybulova_admin
The correlation between the Case serial number and the Movement date code is a fairly recent discovery in Bulova history.
If this movement is a swap the person doing the work would need to have known this or being only one year off was very lucky as production of the 10AN covers a fairly lengthy time period.
imo the watch is indeed 1927.
In reply to Sorry to have given you all… by davep