Seiko Cal. 3891 - 685

This Spring Drive model from 1993 features a 46mm Stainless Steel case. Powered by the 3891 caliber with 18j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-447f92637b77]

Also known as: Monster, Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1993

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