You need to get assistance from a qualified gunsmith.
Contact Browning.
Possible.
Baby Browning.
A Browning Hi Power
They refer to this handgun as the browning model BDA (browning double action auto) pistol.
No such model made by Browning.
This would be a Browning Challenger .22 pistol made in 1970.
yes
Exactly how is the pistol marked? 9mm browning serial number 72C44338
Small vest pocket pistol
Obviously, it will depend on the caliber of pistol, and the distance between you and the pistol. A person firing a .357 Magnum revolver would be exposed to ABOUT 140 dB.
Your Browning model nomad 22cal pistol was made in the year 1971.