Seiko Cal. 3861 - 240

The Seiko 3861-240 represents an important milestone in Seiko's 1979 lineup. Powered by the 3861 caliber with 29j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-b4e4dc5227a7]

Also known as: Turtle, Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1979

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