Omega Seamaster 300m Chronograph Automatic 41.5mm Stainless Steel on Bracelet, Stunning White Wave Dial with Luminescent Hour Markers and Hands - Fitted on a stainless steel Omega brick-link bracelet with a foldover deployant clasp, and a scratch resistant sapphire crystal. It has a screw-down winding crown with a crown guard, and a solid screw-down case back engraved with "Seamaster," and the Seamaster logo in high relief. There are screw-down round chronograph pushbuttons, and a Helium escape valve is at 10 o’clock. The 41.5mm diameter solid three-body case, integral downturned lugs, and unidirectional revolving black Ion-plated bezel with faceted edges, are polished/brushed. The dial is white with applied luminous dot hour markers, steel hands with a luminous circle on the hour hand, and a luminous triangle on the minute hand. There is an orange-tipped center sweep chronograph hand, and around the perimeter is a 60 minute/one-fifth second track with Arabic numerals and orange dots every five minutes. There is a date aperture window at the 3 o’clock position, and there are 3 black steel-rimmed subsidiary dials with orange hands, including a constant small seconds register at 9 o’clock, a 12-hour totalizer at 6 o’clock, and there is a 30-minute sub dial is at 12 o’clock. It’s water resistant to 300 meters/1000 feet.

This Omega Seamaster Chronograph 2598.20.00 has a mechanical automatic self-winding Omega caliber 1164 chronograph movement that’s rhodium-plated, with fausses cotes embellishment. It’s constructed with 25 jewels, a shock absorber device, and a monometallic balance. It has a self-compensating flat balance spring, and a micrometer regulator.