Seiko Cal. 6640 - 328

This Spring Drive model from 1988 features a 45mm Gold-Plated case. It features a Burgundy dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-f8e7d0c59625]

Also known as: Samurai, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Burgundy

Jewels

35j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1988

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