Seiko Cal. 5640 - 709

The 5640-709 is a sought-after Spring Drive piece from Seiko's golden era. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-ba5332eb008f]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

14.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1988

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