No
Proofhouse.com has Colt sn tables. You can also call Colt and they will tell you.
Impossible to answer without the sn. Call Colt and they will tell you.
If you call Colt and provide the sn, they will tell you.
50
about 1966
about 1947
no, just 45 long colt, what is was made for
It should be marked on the gun- something like .410/ 45 Colt.
@1959
50-200 USD
Colt data at Proofhouse.com
You will have to call Colt with the sn to find out.