A Vintage Rolex
From Beyer in Zürich, Switzerland
Beyer in Zürich, Switzerland is one oldest watch retailer in the world and they and they are about to celebrate their 250th Anniversary in 2010. This vintage Rolex Oyster appears to be from the late 1920's or early 1930's.
It's very interesting (T. Walker Lloydism) how this watch and the one in the post below it both have special Rolex AD reseller dial designations on them, yet one is from Switzerland and the other is from South America.