Seiko Cal. 3861 - 665

The 3861-665 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 3861 caliber with 36j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-432ec3cda8be]

Also known as: Tuna, World Timer

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1991

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