Seiko Cal. 3813 - 651

This Spring Drive model from 1976 features a 45mm Gold-Plated case. With its 21mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-8e9aa6e2c525]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1976

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