This is a customer's Bulova Rite Angle, 1938 by the date symbol. It had suffered a sudden mainspring break at full power, which backlashed the train and bent the 4th wheel pivot, among others. The spring had shattered into three pieces, which is not that unusual if a spring is old and brittle or has been cleaned ultrasonically. What you see here is the watch before any repairs- the customer does not want it done.
The 8AL is derived from an AS 970 ebauche, with Bulova escapement/balance mods.
By kind permission of the owner.