Seiko Cal. 3887 - 331

This Spring Drive model from 1980 features a 42mm Titanium case. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-a85ac08fd7d8]

Also known as: Sumo, Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1980

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