The prefix to your serial number of 70z indicates that your Browning auto-5 shotgun was made in the year 1970.
Library.
Nothing special.
How do you remove the breech block on a Browning A5 16ga shot gun
No
The .410 Browning A5 is an urban legend. Browninig never produced a .410 A5. No
Browning.
I own a Browning A5, 12ga,Japan made shotgun, ser: 04078. what is it worth?
A5 refers to a shotgun.
You will have to call browning with the sn to find out.
It means that your gun was built in 1997 in Japan.
fn a5