Seiko Cal. 3870 - 733

This Spring Drive model from 1987 features a 40mm Stainless Steel case. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-bb82ba2f1b23]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Black

Jewels

35j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1987

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