Seiko Cal. 5687 - 361

The Seiko 5687-361 represents an important milestone in Seiko's 1982 lineup. Powered by the 5687 caliber with 21j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-776d940c227e]

Also known as: Bullhead, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

8.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1982

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