Seiko Cal. 6637 - 946

The Seiko 6637-946 represents an important milestone in Seiko's 1999 lineup. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-436e75a43e13]

Also known as: Tuna, UFO

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1999

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