Seiko Cal. 6636 - 997

Released in 1972, the Cal. 6636 with design code 997 was part of Seiko's domestic market collection. With its 20mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-e0ea730ac616]

Also known as: Helmet, Navigator

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Champagne

Jewels

24j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1972

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