Can't be answered without a detailed description of all markings, finish, condition, box, papers, accessories, etc..
100-10000 USD or more depending on specifics
Yes, Browning has made the Superposed Lightning in Belgium.
200-400 usd
your browning auto-5 lightweight 20 ga was made in 1963.As to value they are going between 450-650 dollars depending on condition.
100-1000 usd
50-500 usd
100-1000 USD
100-1000 usd
your browning shotgun was made in 1961 with the 1Z prefix to the serial number you provided.
With the suffix of 5Z to the serial number provided,your Browning light weight auto-5 20 gauge shotgun was made in Belgium for Browning in the year 1965.
No
Valued at $1200. I have one.