Seiko Cal. 5640 - 520

The 5640-520 is a sought-after Quartz piece from Seiko's golden era. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-ff7ebc3a5d75]

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

43mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

White

Jewels

26j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1980

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