Seiko Cal. 4540 - 943

The Seiko 4540-943 represents an important milestone in Seiko's 1988 lineup. With its 21mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-aa31a531fbad]

Also known as: Helmet, Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1988

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