Seiko Cal. 4521 - 656

The Seiko 4521-656 represents an important milestone in Seiko's 1981 lineup. Powered by the 4521 caliber with 17j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-75cc29aafec5]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Champagne

Jewels

17j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1981

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