Seiko Cal. 6638 - 260

Released in 1978, the Cal. 6638 with design code 260 was part of Seiko's domestic market collection. The Bidirectional bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-eccea27ea24f]

Also known as: Sportsmatic, Crown

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Champagne

Jewels

19j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1978

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