Seiko Cal. 3884 - 406

This Spring Drive model from 1991 features a 37mm PVD Black case. Powered by the 3884 caliber with 22j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-144a219ab5c0]

Also known as: Monster, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1991

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