Seiko Cal. 3831 - 770

The 3831-770 is a sought-after Solar piece from Seiko's golden era. Powered by the 3831 caliber with 34j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-875662900aff]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1979

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