No way to answer without the serial number
Please add the serial, but it is likely a single barrel trap gun such as the BT99
If you go to browning,s home page there is a way to age your shotgun there.
A shotgun designed to shoo trap with.
Believe that your serial number is incorrect. There are no BT99 serial numbers that start with 47. There are however serial numbers that begin with 74 which is the year (1974)that they were made.
1971
1996
You must call Browning as the sn you gave does not follow normal convention.
100-1000 USD depending on condtion and EXACT configuration, papers, box, accessories.
Incomplete serial number. Get the complete number, go to Browning's site, Support, Date Your Firearm. They have a complete listing.
BT99
Browning doesnt show the BT99 as a 299 model code. They list the BT99 as a model 149. Below is the link to the Browning codes.
You will need to call Browning,s customer service dept for the exact year of production.The model bt99 trap shotguns were originally made from 1968-1994 by Miroku of Japan.The current models were made from 2001-to present.