Seiko Cal. 3831 - 427

This Hand-Winding model from 1970 features a 37mm PVD Black case. With its 21mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-c5cbd65f8233]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1970

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