Seiko Cal. 6620 - 657

This Quartz model from 1993 features a 37mm Hardlex-Coated Steel case. Powered by the 6620 caliber with 33j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-91f4f94811a9]

Also known as: Sumo, Navigator

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1993

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