Seiko Cal. 5640 - 143

The 5640-143 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5640 caliber with 19j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-2a91ede430bc]

Also known as: Samurai, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Burgundy

Jewels

19j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1967

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