Seiko Cal. 6643 - 331

The Seiko 6643-331 represents an important milestone in Seiko's 1996 lineup. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-4c0d94c16cc0]

Also known as: Bellmatic, Crown

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Burgundy

Jewels

35j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1996

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