Omega Calibre 3861

The Cal. 3861 is an in-house Omega movement based on the historic 321 and 861 lineage. It is Co-Axial escapement-equipped and Master Chronometer certified by METAS. This represents a genuine modern upgrade of the Moonwatch's historical movement.

Master Chronometer certified; factory service intervals typically 5-7 years. Omega service is moderately expensive but widely available through authorised service centres globally. The Co-Axial escapement reduces lubricant degradation, potentially extending service intervals.