Hello,
Why do you think you made a mistake?
I agree with
@Tony C. Always check the caseback, movement, reference and serial.
This one could be a reference 20360-2, and if that is the case it should have a 215 microtor. You are right about the crown, the case looks slightly polished, and the dial looks original in my opinion. Better photos would help. This silver dials may look good with some patina, but its a matter of taste and it seems to have all the lume plots.
Is the minute hand broken? Cant tell...
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