Seiko Cal. 6636 - 827

The 6636-827 is a sought-after Quartz piece from Seiko's golden era. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-57c3418ec7ee]

Also known as: UFO, Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

Navy

Jewels

29j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1974

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