Seiko Cal. 6635 - 523

The Seiko 6635-523 represents an important milestone in Seiko's 1982 lineup. With its 18mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-618251ec6abb]

Also known as: UFO, World Timer

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

170m

Dial Color

White

Jewels

24j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1982

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