Seiko Cal. 6640 - 330

The Seiko 6640-330 represents an important milestone in Seiko's 1983 lineup. It features a Champagne dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-9a1813d77b8e]

Also known as: Bellmatic, Sea Horse

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Champagne

Jewels

35j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1983

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