Dissassembly of the trigger guard is required. Recommend a qualified Gunsmith to do the repairs. There are online books and videos on how to repair an A5. Try the American Gun Institute or "AGI" for info on the repair DVD for the A5. Link is below
Your browning auto-5 shotgun was made by FN of belguim for browning in 1957.
your browning auto-5 was made in 1947.
It will be marked where it was made, i.e., Made in Japan or Made in Belgium. IIRC, Browning moved Auto 5 production to Japan in 1976.
Your browning auto-5 was made by FN of belguim for browning in 1958.
your browning auto-5 shotgun was made in 1926.
You will need to call Browning.
50-550 usd
It will be marked "Made in Belgium"
0-500 usd
The suffix of M71 was assigned to the Browning model BAR(Browning semi-auto rifle) which was made in the year 1971 in Belgium for Browning.
Browning's web site has a sn search function.
your browning auto 5 was made in 1922.