George, I hope you don't mind but I put a link to this thread on Shotgun World in the Browning section, there are some very knowledgeable Browning collectors there that may be able to help you. It appears to be a rare and beautiful A5.
Looks like it is first year for the 16 gauge 1909, collectors will be very interested in this gun.
Link to 16 gauge specific information.
http://www.shotgunworld.com/bbs/viewtopic.php?f=53&t=297760

Last edited by johnr; 07/02/15 08:53 PM.