Seiko Cal. 6311 - 937

This Spring Drive model from 1974 features a 40mm Titanium case. It features a Green dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-710b8b965278]

Also known as: Sumo, Pogue

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

120m

Dial Color

Green

Jewels

34j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1974

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