Simply that it was a grade II. Grade I guns had a blued trigger
I don't think Browning can modify trigger pull on their rifles due to liability, but you can contact a retired Browning Gunsmith who does excellent work on pull.
Browning Automatic Rilfe
Usually it stands for "Safety." When activated it keeps the trigger in a safe fire mode.
Yes
Japan
Embellishment
Besides a number of books published on Browning, and some of the gun collector forums (google Browning collectors) you might start with Browning. They have a website, and are still in business making very nice rifles, shotguns, and pistols.
As far as I know browning did not have any firearms made for them in australia.
Depends on the specifics of the one you have.
Rifles can be purchased from the manufacturers such as Browning or Smith & Wesson. Rifles can also be purchased from third-party stores such as Amazon.
5 lbs
Browning has made centerfire lever action rifles in various calibers over the decades.