Seiko Cal. 6640 - 707

This Automatic model from 1998 features a 40mm PVD Black case. Powered by the 6640 caliber with 23j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-190d4e62ba52]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1998

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