Seiko Cal. 5640 - 690

The 5640-690 is a sought-after Quartz piece from Seiko's golden era. It features a Silver dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-8269f5fcdf2b]

Also known as: Samurai, Panda

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

25j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1967

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