Seiko Cal. 4540 - 732

This Kinetic model from 1970 features a 44mm Hardlex-Coated Steel case. Powered by the 4540 caliber with 21j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-130ec3354ef5]

Also known as: Tuna, World Timer

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1970

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