Seiko Cal. 4520 - 648

The Seiko 4520-648 represents an important milestone in Seiko's 1971 lineup. Powered by the 4520 caliber with 19j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-2e921d61856e]

Also known as: Navigator, Sea Horse

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Cream

Jewels

19j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1971

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