Seiko Cal. 5287 - 641

The Seiko 5287-641 represents an important milestone in Seiko's 1971 lineup. Powered by the 5287 caliber with 27j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-5b62b81f1556]

Also known as: Turtle, Navigator

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

27j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1971

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