Hello, I have am selling this vintage Tudor Advisor Ref.7926 The previous owner and I hunted down some history on this (mainly the previous owner). What is known as factual is the following: Dial is original, lume plots have been re-done. -Watch has rare explorer dial. -Details on dial such as missing 'advisor' text and 'SHOCK-PROOF' date this watch to the 1940's which pre-dates the release of the Tudor advisor officially in 1957. (Info from Tudor collectors) This one wears like a 36-37mm watch and is a great example for its age. It is a mechanical wind. It is wound up once every couple of days. Have not had to set time since acquired, it keeps great time. Mechanical alarm works like a charm. Message for any questions, thanks!