Seiko Cal. 6640 - 959

The Seiko 6640-959 represents an important milestone in Seiko's 1983 lineup. Powered by the 6640 caliber with 27j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-16076545d528]

Also known as: Arnie

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1983

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