Impossible to answer without a detailed description of all markings, features, barrel length, sights, grips, box, papers, accessories, condition, type of action, etc..
not worth this headache to find out
50-250 usd
10-1000 USD depending on specifics
50 -550 usd
50-250 USd
100-400 USD
It was made in 1961 and worth can only be established by its' condition.
what is a 1978 .38 special colt cobra serial #m52453 nickel plated with pearl handle worth?
Colt has not offered a AR15 in 308
If you call Colt they will tell you when it was made.
how much is a 1851 colt navy 36 gun
Colt never made this weapon.