Hi!
Hope I'm not in late. Black lettering SVA was applied on rudder, S on green, V on CDL and A on red as I wrote only port side.
11721 had long career before find his home in the museum. After the war, almost all of our single seaters received new treatments for national colors on fin/rudder/tailplane. Stripes were enlarged in space, so for the SVA's green was placed on fin, with rudder divided in two section, of course white and red.
That's why after restoration it sports white central stripe and not CDL.
At the time of the Vienna's flight, no black lettering on nose remembering missions, it was post war feature. 87a Squadriglia was divided in three Section, they were recognizable by different colors on fin and fixed part of tailplane. This is the reason of white fin on 11721. Individual number inside Section was painted on fin, 11721 was, of course, aircraft number 1 in the White Section. There is a photo in Datafile 40 that shows lineup of 87a in the field. 11721 is amongst them, with black 1 on white fixed part of tailplane, unlucky I can't see in what direction. Elevators and upper surface of main wing are comouflaged, upper surface on under wings not. Camo was applied on the field by brushes, not sprayed, it seems a "tangle of worms". I think green only was used for camo, red brown was added later on A.1 Balillas. All struts left factory painted medium grey.
Hope useful!
Roberto