Seiko Cal. 4557 - 720

The Seiko 4557-720 represents an important milestone in Seiko's 1966 lineup. Powered by the 4557 caliber with 33j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-dd4637ca2f3c]

Also known as: Flighty

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Silver

Jewels

33j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1966

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