Seiko Cal. 6639 - 783

This Automatic model from 1983 features a 40mm Two-Tone case. Powered by the 6639 caliber with 21j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-84617f5671a8]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1983

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