Seiko Cal. 5636 - 673

The Seiko 5636-673 represents an important milestone in Seiko's 1971 lineup. With its 20mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-5c8cab1aecf7]

Also known as: Tuna, Arnie

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1971

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