Seiko Cal. 6640 - 940

The Seiko 6640-940 represents an important milestone in Seiko's 1996 lineup. With its 19mm lug width and 12.9mm profile, it sits comfortably on most wrists. [seikata-wm-80eb00717abe]

Also known as: Golden Tuna

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1996

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