Seiko Cal. 5640 - 440

This Quartz model from 1985 features a 36mm Titanium case. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-969c9c621f9b]

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

36mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1985

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