It wil be marked on the barrel.
1970
No
2008
Yes
Goes beyond published data. You will have to call Browning.
No
50-575 usd
your browning shotgun was made in 1963.
You should visit some of the shotgun shooter's forums such as shotgunworld.com and read the threads.
About $150 to 200 in excellent condition.
It will be marked on the barrel or receiver. Most likely Japan or Portugal.
according to Browning Service and a local gunsmith - YES