Seiko Cal. 5644 - 800

This Solar model from 1973 features a 43mm Stainless Steel case. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-e2774b287509]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1973

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