Seiko Cal. 6640 - 240

This Kinetic model from 1967 features a 46mm Hardlex-Coated Steel case. With its 21mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-724f2adfd116]

Also known as: Silverwave

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1967

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