In the 1950s Zenith equipped many Sporto models with a patented clear acrylic inner dust cover – an unusual mid-century solution that gave extra protection against dust and moisture and has become a distinctive signature of the line

small seconds and even speckled patina

The production year of circa 1969 is verified from internal movement serial tables

Service Date: 08-01-2026

Please consider this before bidding so as to avoid any misunderstanding

Circa 110 Years Old IWC Schaffhausen Antique c. 1915 / Cal. 73 Pocket-Watch Conversion / Early Portugieser Lineage / Serviced L633.1 In the 1950s Zenith equippedYou save 369,00 EUR right away The service and identification document is included in the price. This IWC Schaffhausen timepiece is powered by a manually wound Calibre 73 movement dating to circa 1915, as established through the movements serial number. Originally produced for a pocket watch, it has subsequently been converted for wrist wear, bringing an important example of early 20th century Schaffhausen watchmaking into a contemporary format.