Hello folks, looking for some info on my browning sweet sixteen. I cannot find the build date on my sweet no matter where I search. The serial number is ( A over 48 ). This gun is all original and in excellent shape. The Browning web site doesn't recognize it in its serial number break down. The blue book mentions an A prefix but it does'nt explain it. Hopefully there's a Browning buff out there that can help me. Thank you.