Seiko Cal. 4520 - 905

The 4520-905 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-52c0c9e5b3f4]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

8.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1970

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