Reference 220.25.34.20.55.001 presents the Aqua Terra 150m in a 34mm round stainless steel case, finished in a combination of brushed and polished surfaces. The dial is rendered in mother-of-pearl, viewed through a scratch-resistant sapphire crystal, while a transparent case back offers a glimpse of the movement within. Water resistance is rated to 150 metres / 500 feet.
Powering the watch is an automatic chronometer movement that is COSC certified, meeting the rigorous precision standards associated with the Master Co-Axial designation. The fixed bezel frames the dial cleanly, and the crown is a standard push-pull design.
The two-tone bracelet combines stainless steel and 18kt rose gold with a brushed and polished finish, secured by a push-button folding clasp. The categories associated with this reference include a diamond bezel, placing it among Omega's more decorated Aqua Terra offerings.