Seiko Cal. 3831 - 501

The Seiko 3831-501 represents an important milestone in Seiko's 1968 lineup. With its 20mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-ac1bb37082b8]

Also known as: Monster, Arnie

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

25j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1968

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