This Waltham "drunken" chronograph is an important part of history. It houses the TDBK 1369 movement. A development between Tenor-Dorly, Dubois-Depraz, Brac and Kelek. At the time of its release, in the 70s, it was the smallest automatic chronograph on the market. Smaller then the Heuer cal.11/12 and the Zenith 3019 "El Primero". Only 23,000 of these movements were made/released. 38mm Diameter 13.6mm thick Swiss made Automatic TDBK 1369 movement Top left sub dial (by 11 O'clock) is a 6hr chrono counter Right sub dial (between 2 and 3 O'clock) is a 30 minute chrono counter Bottom sub dial (by 6 O'clock) displays running seconds **watch only. Comes with after market box and two after market straps** **please review pictures carefully, as they show all wear and the item/s you will receive**