Seiko Cal. 5649 - 637

The 5649-637 is a sought-after Spring Drive piece from Seiko's golden era. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-f5c26c93c689]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

White

Jewels

32j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1991

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