When I started collecting vintage watches back in the late 1980s there were a lot less brands to collect especially with modern watches. On the vintage side it was Patek Philippe, Vacheron Constantin, Audemars Piguet, Cartier, and Rolex.
One watch that was highly sought-after back then was the Patek Philippe Calatrava reference 96 which is a small men's watch compared to the modern monsters of today measuring only 30 millimeters. The reference 96 was very sellable back then and still is today if the watch is in mint condition. It is predominately sold in Asia due to the small size of the watch.
Many times the Patek Philippe reference 96 is not in very good condition. The cases are over-polished and the dials are refinished due to the snap back case allowing moisture to enter the watch. The dials would get discolored and the dials had to be refinished.
Here is an example of the Patek Philippe reference 96 that is untouched and in near mint condition. It has never been polished, the dial is mint, and the movement has never been touched. Even though the watch is small, I still love the look of the 96 Calatrava when it is in such nice condition. Patek Philippe must like it too because many of their watches today have the base design of the Patek Philippe Calatrava reference 96.
Get more information about this vintage Patek Philippe watch for sale.