Go to Browning.com and look under customer service.
It should be stamped on the barrel
it would be stamped on the right side of the barrel.
No, you need to call Browning.
Made in 1934.
Depends on what they are. Could be choke markings, proof mark, etc..
It was made in 1964.
Have it checked over by a gun smith.
Should be stamped on the barrel, if not, you should take it to a competant gun smith to have it checked
Browning.com has sn data under customer service.
check the date code stamped on the barrel. Remington Society of America, Manufactured Date link has the details.
Browning worked with Winchester in designing several firearms, including the model 1886 rifle. Click on the 'John Browning' link on this page to read a short biography of him and his designs.
While the original length is not indicated on the barrel, the barrel weight is. Example: 1Kg012 which would mean 1012 grams. An accurate scale would help you identify. If the barrel weighs less than the stamped number then the barrel has been altered.