Seiko Cal. 6643 - 861

This Quartz model from 1981 features a 46mm PVD Black case. It features a Green dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-6477cdeacecd]

Also known as: UFO, Sportsmatic

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

13.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1981

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