Well, there's just one hit in Mikrolisk for Adalio: Mikrolisk - The horological trade mark index
Other than that, I can't really tell you much more than you already know. If I were to add anything, it's that very early 1950s (1950, maybe 1951) are also perfectly plausible in terms of the approximate period of manufacture.
A forum community dedicated to watch owners and enthusiasts. Come join the discussion about watch collections, displays, watch winders, accessories, classifieds, and more! We welcome all manufacturers including Casio G-Shock, OMEGA, Rolex, Breitling, Rolex and Tudor, Seiko, Grand Seiko and others.