Seiko Cal. 5637 - 667

The Seiko 5637-667 represents an important milestone in Seiko's 1968 lineup. Powered by the 5637 caliber with 27j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-ea7a6e4278ae]

Also known as: Arnie

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

38mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1968

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