Time2wearit - Zenith Sporto 18 jewels cal.120 from 1950-60's. Works well after being serviced recently. https://www.etsy.com/ie/listing/652609121/vintage-zenith-sporto-watch-swiss-watch?ref=shop_home_active_1 | Facebook
WTS] Vintage 1955 Zenith Pilot with the calibre 120 movement - EU Seller : r/Watchexchange
Zenith - Pilot Stellina - Cal. 120 - No reserve price - Men's - 1960-1969 - Catawiki