Seiko Cal. 4573 - 427

The Seiko 4573-427 represents an important milestone in Seiko's 1968 lineup. With its 20mm lug width and 14.4mm profile, it sits comfortably on most wrists. [seikata-wm-eeb35fb54a80]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1968

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