Seiko Cal. 5240 - 441

This Spring Drive model from 1971 features a 35mm Hardlex-Coated Steel case. With its 18mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-4e4a742e660d]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1971

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