While going through my father's belongings after he passed away, I found a navy blue box with MMM Mondial, made in Italy listed on it. When I opened it, there was a small gun inside. There were instructions in four languages on how to operate the gun. At the top of the page, it says 'Molgora Modesto, Revolver Mod. 999 - 99X-199 - 1038'. The gun itself, there is the MMM - Mondial logo, MOD 199, Cal. 22. On the other side of the gun, there is a 'star inside a circle' and 'Made In Italy, Brevettata'. It shoots 6mm bullets. Can anyone tell me what kind of gun is this and what the value of it may be.