Seiko Cal. 6636 - 161

The Seiko 6636-161 represents an important milestone in Seiko's 1976 lineup. Powered by the 6636 caliber with 30j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-9f6c6ba6c3e7]

Also known as: UFO, Navigator

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1976

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