Seiko Cal. 4431 - 706

This Solar model from 1971 features a 46mm PVD Black case. With its 19mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-f6d9c40b4fd9]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Burgundy

Jewels

19j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1971

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