Browning.com has sn data under customer service.
Impossible to answer without a detailed description and the serial number.
This gun was made in 1968. "U"= Challenger "8" = 1968
Your serial number indicates that it was made in the year 1969.
See the Browning website- customer service. Date of production by serial number listing.
Date my Browning ser number 4t99577 O
04911py153
You will have to call Browning to find out.
what is the year made and value of ser. #'s 7g 10367 &236272 Belgium browning
Call Browning with the sn and they can tell you.
A fine rifle
You must call Browning with the serial number.
Browning never made a model 306