Seiko Cal. 6637 - 558

This Kinetic model from 1968 features a 37mm Stainless Steel case. Powered by the 6637 caliber with 17j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-3b9ace087ca0]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Burgundy

Jewels

17j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1968

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