There are a myriad of unknowns in the handgun world.
Without an actual examination, the upper one looks like a 'Fourth of July' blank-firing pistol - marketed as a noisemaker.
The lower is merely a folding-trigger, vest pocket 'Bulldog' revolver - likely Belgian - with a caliber anywhere from .32 to .380 ('not' the .380ACP, either - but the European loading for a revolver).
No matter what the manufacture - for the most part, makers marked their wares.
Look 'closely' atop the barrel of the upper one - and look for proof markings and a possible maker's name on the side of the lower - use good, strong, natural light - and a sunny day is a great source..
Good Luck!
Vaya,
Scouts Out!