I don't know the company but the model is Guardini Uglyoni
I have no idea, but in the spirit of collective working here is a list of Italian makes I have found in searches
Alexandre
Orsi
Grassi
Borgani
Rampone and Cazzani
Evette marked "Made in Italy"
LaMonte
Benetone
Werner
Beverly
? Martin Busine
I don't know the company but the model is Guardini Uglyoni
Which reminds me that Italians are also fond of acronyms. This is historic -- SPQR, for example -- FIAT is actually an acronym. It also just happens to be a Latin word for "let there be."
Is it a sister to the Guardala Behind Bars model?
*snip* I've done a BIT more research on this model and there's a suggestion on SOTW that maybe, perhaps Desidera "took over" WA Stowasser (reference linky). Helen has mentioned Scott Robinson has said his bass sax is from "WA Stowasser, Verona" (reference linky). All the other mentions I've seen about WA Stowasser = Graslitz (reference linky from someone who's not Helen or me, Edinburgh University).
*snip* However, please do again note that I've not seen anything authoritative that specifically confirms that Desidera took over Stowasser
I did a quick Google and I found a very nice PDF -- with pictures! -- on Italian saxophones. The article says, "... While in Verona the 'Leonildo Desidera e Figli' firm increasingly copied the Stowasser design, particularly for its baritones," (page 62).Hardly strange that Desidera looks distinctly ( aside for the pants guard) as many German and Bohemian saxophones did because Desidera was, in fact, a spin off of the Stowasser factory a company.