Seiko Cal. 4520 - 664

The Seiko 4520-664 represents an important milestone in Seiko's 1976 lineup. Powered by the 4520 caliber with 32j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-8a88fafe12e6]

Also known as: Silverwave, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

White

Jewels

32j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1976

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