This is a nice original Civil War era brass bullet mold. This one is frozen together so we can't see what model it is for but judging from the size, it would be for a .36 Colt navy or .31 caliber Colt pocket model. It is in nice excavated condition with a pleasing green tone patina. This is the one for the famous Colt Firearms Company revolver. You can no longer see the "COLT'S PATENT" makers mark on the top of the sprue cutter that would have been there at one time. The sprue cutter is present as is the screw. On the side of the mold it has an old sticker stating it was excavated at Shiloh. This is a nice original Colt Firearms Company bullet mold.