Portal:Anniversaries/October 21
- 1927 — Mercedes Gleitze swims the English Channel with an early Rolex Oyster provided by Hans Wilsdorf.
- 1940 — Tiffany & Co. opens its iconic showroom at Fifth Avenue and 57th Street in New York.
- 2011 — British watchmaker George Daniels dies. He was one of the most celebrated modern watchmakers, inventing the co-axial escapement now used by Omega.