I guessed at the year based on movement model. Wondering about this case, did Bulova produce salesmans display watches, or is this possibly a marriage? Case diameter about 33mm, case back appears to be base metal or similar composition, with acrylic crystal. Movement has small 48 marking on winding rotor, and either BXW or 8XW on balance bridge. Only markings I can find.
I have one which I will try to post later today (8/2/13). The case back on mine is LO and the movement is a 10AU and marked LO as well. I need a winding stem for mine. Does anyone have one.
The dial on mine says Duo Wind and it had several issues and I fully understand Rob when he says it is a devil of a watch to work on.
John
I have the stainless case back as well and it is dated LO for 1950 but there is definitely a 48 stamped on the rotor. The glass case back is a salemans sample case back used to display the new and different manual wind and automatic wind features. I spoke with my Bulova School instructor and he gave me this information.