Reference 6263 was introduced to the market in approximately 1969 and produced until 1987. While the model was mainly cased in stainless steel, limited numbers were also dressed in 18K or 14K yellow gold. This watch is particularly rare due to its 14K yellow gold case and bracelet, which were reserved for watches delivered to the American market.

Starting from the early 1970s, Rolex began to power its gold Oyster Cosmograph watches with chronometer certified movements. Whilst earlier dials displayed “Rolex Oyster Cosmograph” only, later models featured a different layout that referenced the “COSC” movement.

One of the rarest variants, this dial displays “Superlative Chronometer Officially Certified” floating beneath “Rolex Oyster”, giving way to its name ‘Oyster-split’. Most importantly, the ‘Oyster’ script appears smaller than ever seen before.

Furthermore, gold chronographs were eventually assigned movement numbers, which were engraved on the plate behind the balance wheel. Research shows that this was related to the officially certified chronometer movement. The exceptional condition of this watch combined with its rare features makes it a must have trophy watch for the discerning connoisseur.