Seiko Cal. 6643 - 683

This Spring Drive model from 1965 features a 36mm PVD Black case. Powered by the 6643 caliber with 33j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-ccc17e1e6fa8]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Burgundy

Jewels

33j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1965

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