Seiko Cal. 4550 - 972

The Seiko 4550-972 represents an important milestone in Seiko's 1973 lineup. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-4a30890f5ef6]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

15.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Green

Jewels

26j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1973

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