Seiko Cal. 6131 - 291

The Seiko 6131-291 represents an important milestone in Seiko's 1970 lineup. Powered by the 6131 caliber with 35j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-eda3c0f6aa91]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

35j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1970

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