Seiko Cal. 6657 - 728

This Kinetic model from 1975 features a 37mm Two-Tone case. Powered by the 6657 caliber with 17j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-3b824d68b800]

Also known as: Pogue, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

90m

Dial Color

Cream

Jewels

17j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1975

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