Seiko Cal. 3865 - 714

This Hand-Winding model from 1978 features a 37mm PVD Black case. Powered by the 3865 caliber with 33j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-598279f4f440]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Silver

Jewels

33j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1978

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