Seiko Cal. 3840 - 580

The 3840-580 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-9da9ff2f5182]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1974

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