Seiko Cal. 5637 - 649

The 5637-649 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-f10ebbb249da]

Also known as: Panda, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1981

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