You must call Browning as the sn you gave does not follow normal convention.
If you go to browning,s home page there is a way to age your shotgun there.
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.
Incomplete serial number. Get the complete number, go to Browning's site, Support, Date Your Firearm. They have a complete listing.
100-1000 USD or more depending on specifics
Your gun was manufactured in 1993 according to the serial number. They are well made highly sough after shotguns usually valuing between $1500 and $2000 depending on condition.
You have not provided the entire sn. Call Browning for help
Please add the serial, but it is likely a single barrel trap gun such as the BT99
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will need to call Browning,s customer service dept for the exact year of production.The model bt99 trap shotguns were originally made from 1968-1994 by Miroku of Japan.The current models were made from 2001-to present.
Are you sure the third digit in the sequence is not the letter "D" vs "0"? It should read 72D11255. This would have been made in 1972.