Seiko Cal. 6643 - 555

The Seiko 6643-555 represents an important milestone in Seiko's 1974 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-dbb3311aa29c]

Also known as: Pogue, Sea Horse

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

White

Jewels

18j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1974

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