Seiko Cal. 6657 - 607

The Seiko 6657-607 represents an important milestone in Seiko's 1976 lineup. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-89d8b4654b64]

Also known as: Rally, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Burgundy

Jewels

23j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1976

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