Seiko Cal. 6640 - 517

The Seiko 6640-517 represents an important milestone in Seiko's 1989 lineup. Powered by the 6640 caliber with 28j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-18896cb3405e]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Navy

Jewels

28j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1989

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