Seiko Cal. 6643 - 627

The 6643-627 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-e3901e0a42c7]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1968

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