Seiko Cal. 4493 - 521

The Seiko 4493-521 represents an important milestone in Seiko's 1968 lineup. Powered by the 4493 caliber with 18j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-2c93cc2d15fd]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1968

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