Seiko Cal. 4520 - 726

The Seiko 4520-726 represents an important milestone in Seiko's 1966 lineup. Powered by the 4520 caliber with 22j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-55d470a35dc3]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1966

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