Seiko Cal. 4418 - 540

This Spring Drive model from 1966 features a 34mm Hardlex-Coated Steel case. With its 21mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-9c72c79e7842]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Silver

Jewels

26j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1966

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