Seiko Cal. 6640 - 176

This Spring Drive model from 1997 features a 41mm Hardlex-Coated Steel case. Powered by the 6640 caliber with 28j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-b7e8f79012d0]

Also known as: Samurai, UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1997

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