The crown on Wilhelm's example would most certainly have been
incorrect for this model, and the original watch posted may well have an original crown. In other words, the basic design of the crown is correct for that model. The apparent wear shown on the crown also appears to be consistent with the rest of the watch.
The only question, to my mind, would be the logo, and whether it is consistent with the time period.
I'd say that there's a good chance that this particular old man's memory was operating well.
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