Seiko Cal. 4581 - 312

The Seiko 4581-312 represents an important milestone in Seiko's 1972 lineup. With its 19mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-c9d915c7bcf7]

Also known as: Tuna, Rally

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1972

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