Reverend Rob
Posted March 20, 2018 - 10:39am
A non-conforming means some aspect of the watch has been altered enough that it is not considered original, or typical of the model in question. The designation is to help point out a discrepancy and not necessarily denigrate any particular watch. Your watch is all Bulova, and the movt swap just needs to be noted.
That said, some movt swaps will never be known because the correct model and jewel count has been used. The 10AN has been used in many Bulova watches, and there are quite a few with the 10AE as well. The 10AN is an older movt, so goes back to the 20's models.
Some non-con watches have non-Bulova cases or movts.
I'm leaning towards this being a Chancellor, albeit with an upgraded movt.