The buyer of this watch will probably be a knowledgable collector, and picky about where it is serviced and what is done. They will probably NOT be turned off by the dirty condition, but more likely see it as a plus. Leave it just as it is, take a few more pics, and put it on eBay. I think the family will be very pleasantly surprised by what it brings.
Servicing prior to selling could cost you more than just what is paid for the service.
I agree with this. Also, wouldn’t you have to send it to Biel/Bienne to have it serviced in order to provide a legit level of confidence to the seller?
Point is, the best way to sell on the open market is as-is, with clear pictures, and a forthright description on a 7 day auction. The market will take care of the rest.
Why don't you make your family an offer ? Are you the one on behalf of the family to sell it?
The buyer of this watch will probably be a knowledgable collector, and picky about where it is serviced and what is done. They will probably NOT be turned off by the dirty condition, but more likely see it as a plus. Leave it just as it is, take a few more pics, and put it on eBay. I think the family will be very pleasantly surprised by what it brings.
Servicing prior to selling could cost you more than just what is paid for the service.
What about kidney ?