Omega Seamaster 300M GMT 'Great White' 2538.20

The Omega Seamaster 300M GMT “Great White” stands out as one of the most distinctive and desirable GMT variants in the Seamaster lineup. Its bright white dial—paired with bold black markers, skeletonized hands, and a striking red GMT hand—creates a crisp, high-contrast aesthetic that instantly earned it the “Great White” nickname. The 41 mm stainless-steel case maintains the classic Seamaster 300M silhouette: scalloped bezel, wave-dial texture, and helium escape valve at 10 o’clock. Combined with the black 24-hour bezel insert, the watch feels sporty, modern, and unmistakably Omega.

Behind the dial sits the Omega Calibre 1128, a robust automatic GMT movement offering smooth operation, independent hand adjustment, and reliable everyday performance. With 300 meters of water resistance, a sapphire crystal, and the iconic multi-link Seamaster bracelet, the Great White is as functional as it is visually striking. On the wrist, it wears with a perfect blend of sportiness and refinement—equally comfortable as a travel companion, a daily wearer, or a standout piece in a diver-focused collection. For enthusiasts, the 2538.20 remains a cult classic: rare, distinctive, and packed with Omega character.

Reference: 2538.20

Dated: 2001

Bracelet: Stainless Steel Bracelet

Case Size: 41mm x 13.5mm Thickness

Lug Width: 20mm

Case Metal: Stainless Steel

Movement: Omega 1128 - Automatic - Serviced 06/25 running (+4s/d 295 amp)

Functions: Hours, minutes, seconds, Dual Time Zone, GMT

Accessories: Inner & outer boxes, and warranty card

Crystal: Sapphire

Bracelet size: 7.5"

Case has light wear with a couple little marks on lug ends. Bracelet has minimal light wear. Dial, hands, and crystal have no wear. Serviced 06/25 running (+4s/d 295 amp).

Founded in 1848 by Louis Brandt in Switzerland, Omega has grown into one of the most respected and innovative names in watchmaking. The brand’s early focus on precision earned it accolades at international observatories and competitions, setting the stage for decades of horological achievement. Omega became the official timekeeper for the Olympic Games in 1932, and in 1969, the Speedmaster Professional—nicknamed the "Moonwatch"—made history as the first watch worn on the lunar surface during NASA’s Apollo 11 mission. Omega’s innovations continued with the introduction of the Co-Axial escapement in the late 1990s, a groundbreaking movement that dramatically reduced friction and improved long-term accuracy.

Omega’s lineup showcases a wide range of iconic models that reflect the brand’s legacy and versatility. The Seamaster, introduced in 1948, is a favorite among divers and famously worn by James Bond since 1995’s GoldenEye, blending technical capability with cinematic cool. The Speedmaster remains one of the most storied chronographs in existence, while the Constellation is known for its refined design and chronometric precision. The De Ville collection offers a more elegant, dress-focused aesthetic, often featuring high-end complications and meticulous finishing. Omega continues to lead with innovations like Master Chronometer certification, METAS testing, and antimagnetic technology—ensuring that its watches are not just beautiful, but built for the demands of modern life.