Seiko Cal. 3815 - 438

This Spring Drive model from 1967 features a 46mm Stainless Steel case. With its 18mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-5530ddc1b98b]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1967

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