Seiko Cal. 6643 - 843

The 6643-843 is a sought-after Spring Drive piece from Seiko's golden era. The Coin-Edge bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-e76f4f741fae]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1970

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