Hello Rem,

If you go down this listing you'll find:

Art Manifattura Armi, Gardone, Vt, Brescia i-25063

armi.art@intred.it

They are surely the makers of the side lock you mention.
The fact that it has a hinged front trigger and is marked
"acciaio speciale" (special steel) makes me think it is not
as lowly a gun as you think. JMTC.

Best,

JC

"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin