Seiko Cal. 3870 - 790

This Hand-Winding model from 1991 features a 39mm Hardlex-Coated Steel case. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-3864b6ae446e]

Also known as: Samurai, UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Navy

Jewels

30j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1991

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