Seiko Cal. 6640 - 347

This Automatic model from 1993 features a 44mm Two-Tone case. Powered by the 6640 caliber with 20j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-7d831683d258]

Also known as: Monster, Emperor

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1993

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