Seiko Cal. 6637 - 160

The Seiko 6637-160 represents an important milestone in Seiko's 1985 lineup. Powered by the 6637 caliber with 29j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-ffdc8f28c554]

Also known as: Turtle, UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1985

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