Contact browning directly and there customer service site should answer your question.
Yes.
No
All Browning B-2000 shotguns were Belgium manufacture but assembled in Portugal.
Use the link to date this Browning
Browning's USA website does not provide date of manufacture information for Belgium made Brownings. They only provide this data for US manufacture and Japanese made.
see the Browning website
You will need to call Browning.
your browning auto-5 shotgun was made in 1926.
your browning auto 5 was made in 1922.
Go to Browning's site, click on Support then date your firearm.
This gun was made in 1976
1980