Seiko Cal. 4420 - 754

This Solar model from 1971 features a 34mm Two-Tone case. With its 18mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-d407d0cfbb4e]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Silver

Jewels

22j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1971

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