Can't be answered without a detailed description of all markings, finish, barrel length, condition, accessories, box, papers, etc..
You will have to call Browning to find out.
Go to the Browning website, look under Customer Service. You will need the serial number, not a patent number.
1969
100-500 or so
100-500 USD
why do you have one for sale?
100-400
100-1000 usd
550 USD
100-1000 USD or more depending on specifics
100-600 usd
Between $800-$900, very rare! I'm an expert on Browning arms, I own over 1000