Seiko Cal. 6657 - 937

The Seiko 6657-937 represents an important milestone in Seiko's 1979 lineup. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-52cd61dad420]

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Champagne

Jewels

32j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1979

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