Reference 2508 was introduced to the market in the mid 1930s. The first generation featured oval chronograph buttons, whereas the second series were fitted with rectangular pushers, such as the present watch.
Different versions of reference 2508 are described and illustrated in I Cronografi Rolex - La Leggenda, Pucci Papaleo Editore, pp. 80-91
Gay Frères was established in 1835 by Jean-Pierre Gay and Gaspard Tissot. The company's workshop in Geneva was dedicated to the fabrication of chains as well as bracelets and became popular due to its quality of work and the originality of its creations.
Gay Frères was a key supplier to many prestigious watch companies, such as Patek Philippe and Rolex, and bracelets made by the company can add value to vintage pieces. In 1930 Gay Frères Geneva was followed by a sister company in Annemasse, France, known as Gay Frères Annemasse. While Gay Frères Geneva was sold to Rolex in 1998, Gay Frères Annemasse still exists in France producing exquisite jewellery items.