I figured that. I was just trying to see if any knowledge exists before I recommend he spend 100 CHF for Patek to search their archives. He just does not have a discretionary source of funds.
He resent photos to me and the watch does have a hunter case on it. On the inside of the cover of the hunter case is the number 409835. The Patek symbol is there and the case is 18k yellow gold. On the inside of the cover is the number 1566 40 and that same number is on the Patek movement itself so they are matching.
Any of you have any kind of knowledge about the watch?