The 11AAC movement only shows up in the database in 1950 dated Duo-Winds. Case markings seem to indicate assembly in Switzerland. Below is an ad from 1952. Dates are off, but text for #18 Duo-Wind "G" makes mention of WaterTite "E" as "SIMILAR TO ABOVE, but " all stainless. If the ad said "same as above, but" like most Bulova ads, it would be in the same casing as the above watch except stainless. I wonder if the "similar" is the duo-wind movement and allow leeway to use whatever stainless case would accept an 11AAC? Why else would a WaterTite be listed as a sub-listing on a DuoWind?
Case is similar to Watertites in ads, but slightly different. No mention anywhere I can find of a DuoWind WaterTite except this ad.
Watch case and movement are too early for a dial marked "Automatic" but is otherwise a match, as are hands. I propose this is a Swiss assembled watch perhaps using available stock (1948 case) and 1950 movement to assemble a 1950, 1951 or 1952 Watertite "E". Face text can be explained by a dial refinish much later using the current wording for "Duo-wind" (automatic)
Based on the fact that the movement is a 1950 and true assembly can't reasonably be determined by the case, and earliest ad dated 1952.
1950 WaterTite "E"