Seiko Cal. 3861 - 820

The Seiko 3861-820 represents an important milestone in Seiko's 1986 lineup. Powered by the 3861 caliber with 21j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-268432144e65]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

14.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1986

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