You need the services of a professional firearms appraiser
In 1849, production of the Colt Pocket Percussion revolvers began. Below is a link with a short history of the Pocket Colt.
Yes, at one time, several companies made .25 caliber semi automatics or revolvers. At the present time, I don't think there are but a few. I think Beretta still makes a .25 ACP pocket gun.
What is the value of 1903 colt pocket pistol.32 calibre?
The .31 caliber pocket pistol is based on the volcanic repeating arms company's .31 caliber lever action pistol using rocket ball ammunition( I think, but don't rely on my answer if your question is for something important because I might be wrong.)
The .32 S&W cartridge (also known as the .32 S&W Short) was introduced in 1878 for Smith & Wesson pocket revolvers. It was originally designed as a black powder cartridge. The .32 S&W was offered to the public as a light defense cartridge for "card table" distances.
25-75 USD or so
Hundreds. They are generally separated into revolvers and pistols (anything not a revolver) But then it becomes complex. There are different types of revolvers, such as single action, double action, top break, tip up, swing out cylinder, etc. There are single shot pistols that are top break, and bolt action. There are double and single action pistols, and even fully automatic (machine pistols). There are shotgun pistols, small caliber pistols, ones that will fit in a vest pocket, and some that have scopes and a bipod. There are antique black powder pistols and revolvers, and pistols with frames made of plastic type polymers. The study of firearms is a VERY broad subject.
Lots of makers made 25 cal pocket pistols. Embellishment may or may not be done by the maker
Liberty: Trade name used by the Norwich Falls Pistol Company (O.A. Smith) on inexpensive pocket revolvers.
Old catalogs
100-1000 or more depending on specifics
yes