I have a musket and its a double barrel. It says in small writing montgomery, which may be the type of musket it is?? I have no idea. It has the initials of my great grandfather on it carved in as well. How much do you think that this is worth? I have a bunch of pictures. Does anyone know any sites or any info at all about this?? I would really appreciate any info and help. I have no idea where to go or look. Thank you so much in advance.