Seiko Cal. 4457 - 342

The Seiko 4457-342 represents an important milestone in Seiko's 1972 lineup. Powered by the 4457 caliber with 30j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-945371945d52]

Also known as: World Timer, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

White

Jewels

30j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1972

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