Seiko Cal. 6639 - 231

This Solar model from 1973 features a 36mm Titanium case. With its 19mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-9bb2f4f679c0]

Also known as: Tuna, Crown

Specifications

Movement

Solar

Case Material

Titanium

Case Width

36mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1973

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