Reference 220.10.38.20.56.001 represents the Aqua Terra 150M at its most composed — a 38.5mm stainless steel round case housing an automatic chronometer movement that carries full COSC certification. The grey dial sits beneath scratch-resistant sapphire crystal, while a fixed bezel and screw-in crown reinforce the watch's 150m/500ft water resistance rating.
The stainless steel bracelet features a brushed and polished finish secured by a push-button folding clasp, lending the piece a clean, considered look from the wrist up. A transparent case back allows a view of the movement within, offering a window into the mechanical workings that define this Co-Axial Master Chronometer.
This example is presented in new/unworn condition, making it a compelling choice for anyone seeking a versatile Omega Seamaster with the precision credentials of a certified chronometer movement.