Seiko
SMGG21 aka Rotocall
SPECIFICATIONS
Movementquartz
CaliberSeiko A824
Case size37mm
Case materialStainless steel
Case shapeoctagonal
Thickness10.6mm
Lug width20mm
Water resistance100m / 10 bar
CrystalHardlex
Dial colorlight gray
Complicationschronograph, alarm, dual time, rotary switch, battery life warning, timer, counter, 24-hour indicator
Release year2025
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The Seiko SMGG21 'Rotocall' is a modern reissue of Seiko’s 1982 digital watch, known for its distinctive octagonal rotary bezel interface and use by NASA astronauts. This 37mm stainless steel digital quartz watch features a light gray dial, a unique mode-selecting rotating bezel, and 100m water resistance. It pays homage to its space-faring heritage with an updated A824 digital module.