Seiko Cal. 6638 - 620

Released in 1991, the Cal. 6638 with design code 620 was part of Seiko's domestic market collection. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-e92a15bac2ff]

Also known as: Sportsmatic

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1991

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