Its easy.
Get a competant watchmaker to
1) open the caseback
2) take clear pictures of the insides of everything, specifically the caseback (inside, where a model reference number of the older watches usually is, and the movement serial number (and caliber) on the movement)
3) post them here
Then you will get the information you are looking for.
In anycase, even if you lose out, and the original seller want to sell this off, they would be asked to furnish such pics regardless.
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