Seiko Cal. 5664 - 803

The 5664-803 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-57f26fcd2fc2]

Also known as: Sumo, Navigator

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1973

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