The winding crown on the left side shows that this Hamilton is more than just a pretty face. Granted, the panda dial and the matching date disc are seriously sexy, but the position of the crown and the “Chrono-Matic” name gives away the historical importance of this watch. Indeed, they indicate that this Hamilton houses one of the very first automatic chronograph calibers ever made, the caliber 11. Back in the late 1960s, this movement was indeed a contender with the Seiko 6139 and the Zenith El Primero for the title of first automatic chronograph, and was developed by a consortium of manufactures including nothing less than Heuer, Breitling, and Hamilton. They chose a modular construction, resulting in a noticeable thickness (14mm for the case) and a pretty unique placement for the winding crown. You should note that there are some missing lume dots near the indexes on the left side, but otherwise, this Hamilton remains in pretty sweet condition.