10-100 USD or so
The earliest patent for a revolver was issued in 1818, for a flintlock revolver. There were other patents for revolvers, but the most significant was the Colt patent, which issued in England in 1835 and in the US in 1836. The specific thing that was patented was not the revolver, but a revolver designed in such a way that the cylinder was rotated and locked by the action of cocking the hammer.
BLue Book of Gun Values
Needs to be examined by a gunsmith
You need to see a gunsmith
Depends, A "Single Action" revolver, such as the Colt Peacemaker, carried in the old West, DID have to be cocked before each shot. A "Double Action" revolver, such as a current day Smith & Wesson, does not require that the hammer be cocked- it CAN be- or the trigger can be pulled, and the hammer will rise and fall.
No known sn data published. Probably early 1900's
Not without pictures
No published data.
It means that you have to pull back the hammer for each shot.
Yes
barrel, cylinder, frame, sights, hammer, grips, springs
You hold the hammer, pull the trigger and gently ease the hammer into the firing position. Be sure to point the gun away from any people at all times.