Omega 311.30.44.51.01.002 (Pre-owned - Good) — USD 4,176 on eBay

The reference 311.30.44.51.01.002 represents Omega's Co-Axial series interpretation of the Speedmaster Moonwatch chronograph. This particular reference distinguishes itself within the Speedmaster lineup through its automatic movement and Co-Axial designation, differentiating it from manual-wind variants in the collection. The watch features a 44.25mm stainless steel case housing an automatic movement. The black dial is protected by sapphire crystal, while a fixed tachymeter bezel provides the characteristic graduated scale. Water resistance is rated to 50 meters, positioning this as a dress sports chronograph rather than a tool watch. This reference appeals to collectors seeking Speedmaster aesthetics with automatic convenience. The larger 44.25mm case size caters to contemporary preferences for substantial wrist presence, while the Co-Axial series positioning places it in Omega's modern mechanical offerings. The sapphire crystal and automatic movement represent contemporary updates to traditional chronograph specifications.