You will have to call S&W with the sn to find out.
Proofhouse.com has Colt sn data.
100-500 USD depending on specifics
100-500 USD
If they are numbers off the butt, they are the sn.
Need a sn to date it.
You will need to contact Ithaca. Published sn's do not go that high.
Need a sn to date it.
Need the guage to determine age
Impossible to answer. You will need to call S&W
Need the sn to answer
You will need to call Colt to find out.
You will need to call Browning with the sn to find out