Seiko Cal. 6643 - 441

The Seiko 6643-441 represents an important milestone in Seiko's 1991 lineup. Powered by the 6643 caliber with 20j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-32788361e65b]

Also known as: Silverwave

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

White

Jewels

20j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1991

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