Seiko Cal. 6657 - 398

Released in 1987, the Cal. 6657 with design code 398 was part of Seiko's domestic market collection. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-cac4dbaa60d4]

Also known as: Samurai, Sportsmatic

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

38mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1987

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