Seiko Cal. 3851 - 581

The Seiko 3851-581 represents an important milestone in Seiko's 1985 lineup. Powered by the 3851 caliber with 33j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-ef84518cbfda]

Also known as: Monster, Crown

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1985

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