The Rolex Yacht-Master is a sport watch made by Rolex, first introduced in 1992 with the model 16628 in 18-carat yellow gold. In 1994, Rolex released a lady's model (69628) and a mid-size man's model (68628), which was the first time Rolex had ever issued a smaller professional size watch. In 1996, Rolex introduced two-tone (stainless steel and 18-carat yellow gold) to the lady's and mid-size line.
In 1997, Rolex released the Yacht-Master in Rolesium, a term patented by Rolex in 1932 which gives the Yacht-Master a stainless steel and platinum construction; the bezel and dial are platinum, while the case, band, crown, etc. are stainless steel. This model is also known as the Platinum Yacht-Master.
In 1999, Rolex discontinued the model two-tone 68623, replacing it with the two-tone model 168623 in 2000. The difference between the two models are in the upgraded movement in the 168623, and the heavier 18-carat gold links (the links in the 68623 are hollow).
- The Rolex Report pg. 72 by John E. Brozek