Seiko Cal. 5640 - 350

The Seiko 5640-350 represents an important milestone in Seiko's 1972 lineup. With its 20mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-ecdfdc6aecd6]

Also known as: Monster, Goldfeather

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

42mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1972

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