Seiko Cal. 4550 - 580

The Seiko 4550-580 represents an important milestone in Seiko's 1979 lineup. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-5e1b9ff5b176]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

White

Jewels

25j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1979

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