Supply and demand at work.
You would have to call Browning to find out.
Saw one today @ : Shooters Supply in Hutchinson, KS (620)662-8141.
FN
yes they can
according to Browning Service and a local gunsmith - YES
No
No
Go to http://www.fnhusa.com/ it is a yes/no answer.
Neither.
Contact Browning.
Depending on the model and age, different places. All are marked as to where made.
It is possible. In addition to a serial number having been removed, the Browning plant in Belgium was taken over by the Nazis in WW II, and produced Browning pistols for the German military. While they were SUPPOSED to have serial numbers, things are not always done correctly during a war.