OK, following johnr's advice I located the serial number on the barrel which confirms that the 266 number on the frame is in fact the SN for the gun. That makes this one a first year of production for the 16ga guns. The serial number sequence started over at 1 in 1909 for the new 16ga guns.
I am researching the gun for a local guy who'd like to sell it. I don't collect Brownings, but suspect this one would be of interest to someone who does. The owner has (of course) asked my estimate of value and I got no idea...Geo
