Seiko Cal. 5631 - 341

The 5631-341 is a sought-after Solar piece from Seiko's golden era. Powered by the 5631 caliber with 34j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-f9fb842fa4de]

Also known as: Helmet, Navigator

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1977

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