Seiko Cal. 5640 - 670

This Spring Drive model from 1965 features a 39mm PVD Black case. With its 18mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-589fb9da68e5]

Also known as: Goldfeather

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

170m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1965

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