Seiko Cal. 5640 - 405

This Spring Drive model from 1986 features a 35mm Stainless Steel case. With its 19mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-493c52e81064]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1986

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