Bulova 1949 Aviator

Alright so what do we do with this one?  Obviously we know the model.  This is a 1942'ish rose gold Alderman.

I'm assuming the original movement crapped out and was replaced by a very clean 1949 10BC.

So... is the watch a 1942 Alderman with replacement movement OR a 1949 Non-Conforming.

See... I think the label Non-Conforming degrades some of these watches that have replacement parts.  Who knows... Bulova could have replaced this movement under warranty itself.  Though I'm betting this was a watchmakers work.