Seiko Cal. 4557 - 723

This Hand-Winding model from 1976 features a 44mm Hardlex-Coated Steel case. Powered by the 4557 caliber with 35j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-2e7e2c3e509a]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

White

Jewels

35j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1976

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