Seiko Cal. 3861 - 613

The Seiko 3861-613 represents an important milestone in Seiko's 1978 lineup. It features a Black dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-771fa1d8558a]

Also known as: World Timer, Sea Horse

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1978

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