Seiko Cal. 6643 - 375

The Seiko 6643-375 represents an important milestone in Seiko's 1966 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-88621d2d02e4]

Also known as: Panda, Bullhead

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1966

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