Seiko Cal. 4520 - 645

The 4520-645 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-3b1cea1d4a13]

Also known as: Emperor, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1976

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