A historical perspective of the Rolex Daytona

Rolex Daytona comparison

Rolex made known its first chronograph models around 1937.  In 1960, Rolex gave the chronograph line a major facelift with the introduction of the Cosmograph (model 6239), a Rolex trademarked term which is similar to the chronograph–the cosmetic difference being that the ‘tachymeter scale’ is printed (or engraved) on the bezel rather than [...]