Impossible to answer without a detalied description of all features and markings.
Depends on what they are. Could be choke markings, proof mark, etc..
Impossible to answer without a detalied description of all features and markings.
Need a detailed descripton of all markings, finish, accessories, box, papers, etc..
Need a detailed description of finish, condition, box, papers, all features and markings.
No
your browning auto-5 was made in 1925.
your browning auto-5 was made in 1927.
Your browning auto-5 wa made by FN of belguim for browning in 1931.
Your browning model auto-5 12 ga was made in 1928.
your browning auto-5 was made in belguim by FN in 1914.
Your browning auto-5 shotgun was produced in 1931.