Sotheby's Important Watches sale in Geneva on May 14 features several incredible vintage Rolexes dating back to 1940. Here's our top five: 

1.) Ref. 2508

This 1940 stainless steel chronograph wristwatch, reference 2508, has a black dial and is estimated to go between $15,360 - $25,600.

2.) Ref. 6234

A gorgeous anti-magnetic Oyster Chronograph wristwatch from 1956 with an estimated price tag between $10,240 - $15,360.

3.) Ref. 6238

A beautiful (and rare) pre-Daytona stainless steel centre seconds chronograph wristwatch, circa 1957.  It's estimated to go between $15,360 - $30,720.

4.) Ref. 6263

This 1974 Oyster Cosmograph is a beautiful stainless steel wristwatch that's expected to go between $20,480 - $40,960.

5.) Ref. 6036

An exceptional and extremely rare yellow gold anti-magnetic Oyster Chronograph wristwatch with a triple calendar. Expected to go between $102,399 - $153,599.