Seiko Cal. 6638 - 443

The Seiko 6638-443 represents an important milestone in Seiko's 1984 lineup. Powered by the 6638 caliber with 32j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-17e1fa4779af]

Also known as: Tuna, Goldfeather

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Black

Jewels

32j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1984

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