Seiko Cal. 4420 - 710

This Automatic model from 1975 features a 46mm PVD Black case. With its 19mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-539b56b966aa]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1975

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