Seiko Cal. 4490 - 498

This Spring Drive model from 1973 features a 40mm Stainless Steel case. With its 19mm lug width and 8.1mm profile, it sits comfortably on most wrists. [seikata-wm-0e67f33f5c2c]

Also known as: Helmet, World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1973

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