Seiko Cal. 6657 - 357

The Seiko 6657-357 represents an important milestone in Seiko's 1976 lineup. Powered by the 6657 caliber with 27j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-e295dbadc26c]

Also known as: Silverwave

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1976

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