Seiko Cal. 6639 - 779

This Hand-Winding model from 1978 features a 42mm Gold-Plated case. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-81859e8f868b]

Also known as: Helmet, UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1978

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