Seiko Cal. 3865 - 187

This Hand-Winding model from 1984 features a 44mm PVD Black case. Powered by the 3865 caliber with 34j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-ec4245cfb966]

Also known as: Monster, Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

White

Jewels

34j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1984

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