Vintage Longines Mystery Dial 10K Gold Filled Men's Dress Watch

Watch runs and includes a Lizard strap.  I have never seen this watch with a black disc, so it may have been redone at some point.  If so, the quality of the work is very nice.  It contrasts with the champagne dial and gold case well, making for a very unique look!

From a watchmaker estate.

Shipped to CONUS in recycled packaging.

Please let the photos be a guide for you.