Seiko Cal. 3870 - 930

This Hand-Winding model from 1986 features a 45mm PVD Black case. Powered by the 3870 caliber with 27j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-4be79e1bbe26]

Also known as: Bellmatic, Navigator

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Burgundy

Jewels

27j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1986

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