Seiko Cal. 4550 - 530

This Quartz model from 1977 features a 42mm Hardlex-Coated Steel case. Powered by the 4550 caliber with 33j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-66113c7ec1ab]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

33j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1977

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