Seiko Cal. 5640 - 140

This Quartz model from 1989 features a 41mm Titanium case. Powered by the 5640 caliber with 23j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-84c0c07b4805]

Also known as: Monster, Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

12.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1989

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