Seiko Cal. 6637 - 881

Released in 1983, the Cal. 6637 with design code 881 was part of Seiko's domestic market collection. It features a Black dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-cf8ce995a79c]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

10.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1983

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