Seiko Cal. 6636 - 703

Released in 1975, the Cal. 6636 with design code 703 was part of Seiko's domestic market collection. With its 18mm lug width and 14.6mm profile, it sits comfortably on most wrists. [seikata-wm-0baf22667ea2]

Also known as: Tuna, Crown

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1975

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