Seiko Cal. 6311 - 931

The Seiko 6311-931 represents an important milestone in Seiko's 1974 lineup. Powered by the 6311 caliber with 36j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-6c5d841a2f7f]

Also known as: Pogue, Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

13.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1974

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