Hey there! For sale is an Omega Speedmaster Automatic, reference 3520.50.00, commonly known as the Triple Date or Mk. 40. This 39mm watch uses Omega’s automatic Caliber 1151 based on the Valjoux 7751, an automatic chronograph with day, date, and month indicators. I’ll link the Worn and Wound article that has made me buy this watch twice now: [https://wornandwound.com/review/owners-review-the-omega-speedmaster-automatic-day-date-3520-50-00/](https://wornandwound.com/review/owners-review-the-omega-speedmaster-automatic-day-date-3520-50-00/) The watch is in good condition. I’ll let the pictures speak to the externals, and I’ll be glad to supply more pictures of any detail you’d like to see. Internally the watch is running very well. The watch has been losing 4 seconds per day for me, which is very good for its age. The calendar functions work very well, and everything advances precisely at midnight. Chronograph engagement is very crisp with these movements, and it starts, stops, and resets as it should. The watch is sized for my slightly under 7” wrist, and will include one extra link. Album: [https://imgur.com/a/DL0tvGw](https://imgur.com/a/DL0tvGw) Timestamp: [https://imgur.com/a/QgEuPpV](https://imgur.com/a/QgEuPpV) Asking **$1,950** including insured shipping to the CONUS by USPS. I will accept PayPal for payment, with G&S adding 3%. I will entertain trades for other Omega watches. Thanks for looking!