It's possible and likely that the crown is not original. It is my understanding that time-only Movados in the 1940s came with a domed crown. I am not too sure if the same convention was held for gold plated watches but from new old stock examples of 40s time-only Movados I've seen over the years, they all had the same dome shaped crown (be it full steel or chrome plated). Not a Movado expert, but just some observations over the years. Cheers.
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