Patent Firearms PT and FA (as used by Colt)
The Book of Colt Firearms has what you are looking for.
value depends on overall condition. You listed ' colt 22 ptfa' what model colt. serial number, barrel length, pistol, revolver ?????????????
Check on the butt.
PTFA on a Colt Frontier Scout barrel stands for "Post Tension Fire Arm." This designation indicates that the firearm was manufactured with a specific tensioning process to enhance the strength and durability of the barrel. The Colt Frontier Scout is a .22 caliber revolver known for its lightweight design and is often sought after by collectors.
100-1000 USD
your question is like asking what is my 1958 car worth ?? what model colt, what caliber, what condition. bore condition, metal condition and so on.......
300 to 1000 dollars depending on bluing and genral condition
50-350 usd
the colteer 22 rifle was made from about 1957 to 1966. About 25,000 were made. No serial numbers
100-1000 USD depending on EXACTLY what you have, condition, originality of all parts, box, papers, history, etc..
Impossible to answer without a detailed description of condition.
Impossible to do without pictures or hands on evaluation.