Seiko Cal. 5640 - 760

The 5640-760 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-5f68fb96e136]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

33j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1975

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