Seiko Cal. 3811 - 156

This Spring Drive model from 1965 features a 34mm Two-Tone case. With its 19mm lug width and 10.1mm profile, it sits comfortably on most wrists. [seikata-wm-b46754bb9e68]

Also known as: Bullhead, Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

33j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1965

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