Hey I just got some gun from my grandpa they include a Lite 20, Lite 12, and the sweet sixteen, all belguim browning models. I have not be able to locate the year of the sweet sixteen though, the the barrel has alot of marking on it but i have been able to figure out what they mean. Barrel # is B12625 it says Browning Arms Company St. Louis Mo. The receiver # is S57803 the "S" is above the numbers it has a round knob stock if that helps. The back plate on the stock just says browning nothing else not "FN" but the gun is the worst of the three and has been used the most so that could have been changed. If you know anything it would be very helpful! THANKS