Seiko Cal. 6643 - 203

The 6643-203 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6643 caliber with 27j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-4bbc140a71ac]

Also known as: Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1993

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