Blue Book of Gun Values, Browing web site or call Browning.
SN's are available at the Browning website.
X95029
Browning never used the letter B prefix to there serial numbers.
Every Browning has a serial number on it. The location depends on the model.
Serial numbers allow for dating when produced.
The serial number is on the receiver.
All Brownings have serial numbers.
The letter "k" is not used by Browning in serial numbers.
Check the receiver.
I would go to browning .com.They have a link to serial numbers on the sight that should help you.
Comparison to known serial numbers.
Your serial number falls into the range of serial numbers 1-72,250 which covers the years 1945-1954.During that time Browning did not keep accurate records by year of there serial numbers.