(c): Mars Mountain
ZENITH movement cal. 120. Fairly common with 100 000 made between 1953 and 1962. This particular watch is made in 1961. Central sweeping second hand, 18 jewels manual wind. A special feature is the hack mechanism; the watch stops when the crown is pulled to time setting mode. This allows better precision when setting the time. Gold plated movement with incabloc shock proofing.
The dial has seen better days and the stem is broken. The minute and seconds hand touch preventing the watch from running very long. The plastic crystal has tiny cracks. Beautiful movement, but this one goes into the drawer for now.