The .410 Browning A5 is an urban legend. Browninig never produced a .410 A5. No
It was made in 1949.
This is a 12ga. made in 1937
Your serial number indicates that it was produced in the year 1951.
1967
No
What_is_the_value_of_a_Browning_Sweet_Sixteen
Matt Eastman's book on Browning.
This gun was made in 1961
see the Browning website
300 USD
Impossible to answer without the serial number.