Seiko Cal. 5640 - 686

Released in 1994, the Cal. 5640 with design code 686 was part of Seiko's domestic market collection. The Fixed bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-3cc55deaa337]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1994

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