Seiko Cal. 6644 - 539

This Solar model from 1976 features a 34mm Two-Tone case. With its 20mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-88596053304e]

Also known as: Helmet, World Timer

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1976

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