15-1500 usd
Try Matt Eastman's book on Browning.
Must be examined to be sure.
Your Browning light twelve shotgun,not rifle is valued at between 300-550 dollars for a shotgun with between 60%-90% of its original finish remaining,and a good bore.
Can't be answered without a detailed description of ALL markings, finish and overall condition
Browning has sn data on their website. 400 or so
The manner in which you have asked your question almost guarantees it can not be answered with any degree of accuracy. You need to give the overall condition, serial number, finish, sights, accessories, box, papers, any engraving, etc.. You might be in the 100-1000 USD and up range depending on specifics.
Without any more information, you question is almost impossilbe to answer with any real degree of accuracy. Value will depend on where you live, how bad you want to sell it, condition, finish, accessories, box, papers, engraving, what choke it is, barrel length, etc.. You could be in the 100-1000 USD or more range.
Browning.
Need a detailed description of finish, condition, box, papers, all features and markings.
Your browning light 12 which was produced in 1962 is valued at between 340 dollars for a gun with 50% original finish,up to 650 dollars for a fine specimen with 98% original finish remaining and a good bore.If you have one with a factory vent rib barrel then the value would be 415-900 dollars.
If you own the browning light 12 with a plain barrel then 340-450 dollars based on the shotgun having between 60%-90% of its original finish remaining.If you have the vent rib barrel then 415-630 dollars.
serial number is incomplete. add the letter above or preceding 20023