Seiko Cal. 3865 - 997

The Seiko 3865-997 represents an important milestone in Seiko's 1975 lineup. Powered by the 3865 caliber with 26j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-e140ea5cd926]

Also known as: Monster, Helmet

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

26j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1975

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