Seiko Cal. 6643 - 328

The Seiko 6643-328 represents an important milestone in Seiko's 1974 lineup. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-3b76afdae779]

Also known as: Panda, Rally

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1974

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