Seiko Cal. 3812 - 375

This Spring Drive model from 1977 features a 45mm Two-Tone case. Powered by the 3812 caliber with 17j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-07846b0fac2d]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Burgundy

Jewels

17j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1977

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