Manufacturer Omega Caliber Number 3861 In-House? Technically no Based On Lemania caliber 1873 Movement Type Mechanical, manual-wind Chronometer? Yes (Omega...
Lemania 1873
Brand Omega Caliber Number 863 Base Caliber 861 Base Base Lemania 1873 Movement Type Manual wind Lignes 12”’ Diameter 27mm...
The Omega cal. 1863 found in the Speedmaster. "Famous manual-winding chronograph movement that was used on the Moon. Rhodium-plated finish." -Omega
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