Seiko Cal. 5687 - 846

This Spring Drive model from 1977 features a 35mm Titanium case. With its 19mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-94b8971ec9e6]

Also known as: Monster, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1977

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