Seiko Cal. 4520 - 640

The Seiko 4520-640 represents an important milestone in Seiko's 1987 lineup. With its 21mm lug width and 10.9mm profile, it sits comfortably on most wrists. [seikata-wm-06ecefb8cba5]

Also known as: Arnie

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

34mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1987

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