Seiko Cal. 4550 - 578

The Seiko 4550-578 represents an important milestone in Seiko's 1983 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-013ca30b5917]

Also known as: Sumo, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

17j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1983

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