Seiko Cal. 4520 - 917

The Seiko 4520-917 represents an important milestone in Seiko's 1970 lineup. Powered by the 4520 caliber with 32j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-8c3a63128912]

Also known as: Helmet, World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Cream

Jewels

32j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1970

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