I've got an old trigger assembly that I'm trying to identify. The trigger and the guard are made of iron. It has two letters inside the guard under the trigger. The first one may be a D it's hard to tell. The second is an L. These are stamped into the metal. It also has the letter A in a circle infront of the guard. This is the only marking that I can find on this assembly. Any help to identify what make and model firearm this came off of would be greatly appreciated.

Thank you

Joe