Seiko Cal. 6640 - 288

This Spring Drive model from 1973 features a 34mm Two-Tone case. With its 22mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-5e7c38d86221]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

25j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1973

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