No serial number provided
You must call Browning with the serial number.
1982 BPS 20 gauge
Your Browning superposed,over under 20 gauge shotgun was made in the year 1951;with the serial number that you have provided.
Browning has sn data on their website.
Your serial number indicates that you have a Browning light weight auto-5 shotgun in 20 gauge that was made in the year 1959.
The 2Z prefix to your shotguns serial number indicates that your Browning auto-5 was made by FN of Belguim for Browning in 1962.
20 years old
Impossible to answer without the serial number.
No way to tell. You have only liste a partial serial number.
1988
It was made in 1959