In 1963, production of the COSMOGRAPH began with the reference 6239, initially with a VALJOUX 72B movement, and identical to that of the 6238 models.
In 1965, the first model with screw-in buttons was produced.
TheDAYTONAboom started in Italy in 1985, when a magazine published on its cover the photo of G. Agnelli, arm resting on the mast of a boat, wearing a classic 6263 with light-coloured dial. A simple photo that would breath new life into a model that for 22 years had never really found its public.
- Movement: Swiss Valjoux 7750 ETA Automatic Chronograph
- Functions: hours, minutes, seconds, fully functioning Chronos, Minute and hour totalisators activated by push buttons, button at 2 starts/stops chronograph, button at 4 resets chronograph, Stopwatch Feature Available Exactly like the Authentics, Seconds Hand Functions at the 6 OClock Sub Dial.
- Size: diameter 40 mm, height 14 mm
- Case: Solid Stainless Steel, screw-in button with a crown logo.
- Dial: blue, three subdials
- Genuine scratch-resistant, pressure-proof sapphire crystal glass.
- Strap/Bracelet: Blue Genuine leather band
- Smooth sweeping second hand,exactly like the real Rolex
- Double locking security clasp
- Green Rolex hologram sticker on the back
- Screws in the links not pins
- Serial/band number on last link/lugs
- Serial number between the lugs
- Serial number on clasp
- Laser etched Rolex crown at 6
- Waterproof (can be worn for regular swimming with no problems)
- Power reserve approx. 42 hours.
- No docs and box
