Seiko Cal. 4470 - 441

This Hand-Winding model from 1992 features a 36mm PVD Black case. Powered by the 4470 caliber with 31j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-4a876e4ec40f]

Also known as: Sumo, Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1992

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