Most probably made by castella with the barells bought from Breda
-Acclaio compresso extra speciale
Possibly meaning fancy steel... doesn really mean much
-Gardone V.T. Italy
Made in italy in the gardone area
Theare should be a PSF STAR NEARBY.. if there is one star with PSF then normal pressure, two star magnum pressure
If however the gun was made before 1962 no magnum testing was done anyway.
-61195 = ?
-10919 = Serial (each pieces hase this number
As for the date look fro any Roman numerals on the gun