Seiko Cal. 3859 - 740

The Seiko 3859-740 represents an important milestone in Seiko's 1970 lineup. With its 20mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-5f2cf02929d5]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1970

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