Hello WatchEx, I'm selling my Omega Speedmaster Rattrapante Split Seconds, ref 3540.50, with a beautiful 3D Carbon Dial, in 42mm. This reference is a rare Speedmaster variant that integrates a rattrapante (split-seconds) chronograph on top of a robust automatic movement. Omega equipped it with caliber 3600, which is derived from the Valjoux/ETA 7750 architecture but substantially modified to include the split-seconds module. The split-seconds complication allows the chronograph to time two simultaneous intervals: when the chronograph is running, pressing the pusher (typically at 10 o’clock) splits the seconds hand into two; one hand “freezes” to mark an intermediate time, while the other continues. Pressing again reunites them. This is managed via a double-cam/lever mechanism, which Omega adopted (inspired by Habring’s refinements) as a more simplified alternative to more traditional double-column wheel systems. More info about the watch can be found here: [https://www.omegawatches.com/en-us/watch-omega-speedmaster-split-seconds-35405000](https://www.omegawatches.com/en-us/watch-omega-speedmaster-split-seconds-35405000) Condition: Good condition with light scratches on the case, bezel and bracelet. Movement is keeping excellent time and all functions work as expected. Scope of Delivery: Watch only. Full album and timestamp: [https://imgur.com/a/lfPoqGS](https://imgur.com/a/lfPoqGS) Asking $2800 shipped and insured to CONUS. No trades please. Payment Methods: Zelle and Wise accepted. PayPal F&F available for established WatchEx users. Beware of impersonators! Always confirm you're speaking to me, [u/Chriskie](https://www.reddit.com/user/Chriskie/). Please let me know if you have any questions. Thank you for looking!