Seiko Cal. 6639 - 779

This Hand-Winding model from 1980 features a 46mm Two-Tone case. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-364083cd8490]

Also known as: Sumo, UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Navy

Jewels

25j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1980

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