The Omega Seamaster Aqua Terra 150M 231.13.42.21.03.001 is the 41.5mm stainless steel automatic Aqua Terra in the celebrated teak-patterned blue dial configuration, the Master Co-Axial certified generation that paired the Aqua Terra's clean dressier-sport profile with an alligator strap finish. The Aqua Terra collection itself sits within the broader Seamaster family as the more refined, less overtly dive-oriented variant, with the 150-meter water resistance, the symmetrical case profile, and the absence of a rotating bezel making it the Seamaster of choice for everyday and dressier wear. The 41.5mm steel case carries the screw-down crown, the conical lugs that distinguish the Aqua Terra from the heavier Diver 300M, and the sapphire crystal caseback that reveals the in-house movement. The blue dial features the horizontally embossed teak pattern that recalls the wooden decks of luxury sailing yachts, applied luminous indices, broad luminous hands, and the date aperture at 3 o'clock. Powered by the Omega Master Co-Axial Caliber 8500 self-winding movement, beating at 25,200 vibrations per hour with a 60-hour power reserve, METAS-certified Master Chronometer status, and silicon balance spring. Fitted to a blue alligator leather strap. Pre-owned, 2024 production, full set with box and papers.