Parker Brother ID
 

My wife's Dad gave her what I think is a double barrel 16 gauge. It has serial number 205909 on all parts and looks like AAMC at the sliding mechanism on the top rear of the gun. Any ideas? Dont know much about older guns. Thanks :)

To get some help here, you must remove the forend from the gun, as well as the barrels, which will give you access to markings on the flat parts of the barrels and the action. The markings on the top of the rib between the barrels will also be of help. Tell us what all those markings are and post pictures if you can.