Seiko Cal. 5640 - 837

The 5640-837 is a sought-after Quartz piece from Seiko's golden era. With its 21mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-28ae1eb9555c]

Also known as: Shogun, Rally

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1972

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