Seiko Cal. 3831 - 391

The 3831-391 is a sought-after Solar piece from Seiko's golden era. Powered by the 3831 caliber with 31j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-a37bc4680b5f]

Also known as: Rally

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

35mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1975

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