Omega Seamaster 'Great White' GMT

Ref: 2538.20.00
Bracelet: steel
Case: Steel
Case diameter: 41 mm
Dial color: White
Crystal: Domed anti‑reflective, scratch‑resistant sapphire crystal
Water resistance: 30 bar (300 metres / 1000 feet)
Movement: Cal 1128
Self‑winding GMT movement with 24 hour GMT hand, chronometer, rhodium‑plated finish.
Power reserve: 44 hours
Brushed steel finish to case and bracelet (as apposed to polished sections on the 50th Anniversary and other Seamasters of the period)

Often compared to the 50th Anniversary GMT but there are subtle differences 
*Case Brushing

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