Seiko Cal. 6137 - 831

The Seiko 6137-831 represents an important milestone in Seiko's 1971 lineup. Powered by the 6137 caliber with 36j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-44fe78241227]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1971

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