Seiko Cal. 3851 - 404

This Spring Drive model from 1970 features a 37mm PVD Black case. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-601960096829]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Cream

Jewels

28j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1970

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