Seiko Cal. 4456 - 420

This Spring Drive model from 1972 features a 37mm Titanium case. With its 21mm lug width and 8.6mm profile, it sits comfortably on most wrists. [seikata-wm-2575dcffc1ea]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

8.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

23j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1972

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