Many German firearms companies made 32 pistols.
It might be rare, but, that doesn't mean it is valuable.
No published sn data
Inexpensive.
if it's a revolver......32 cal revolver ammo if it's a pistol......32 cal pistol ammo
What model?
Impossible to answer without a DETAILED description of ALL markings.
50-500 depending on specifics
Wesson made a few different types
Without a bette descripiton; 10-400 USD
How do I open an Iver johnson 32 cal pistol?
No published data.
32 cal 7.65 mm browning otomatic bojho 46289