Seiko Cal. 6643 - 203

The Seiko 6643-203 represents an important milestone in Seiko's 1980 lineup. Powered by the 6643 caliber with 23j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-bac5393c9c43]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

45mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

23j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1980

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