Ths is a WM F LUDWIG Drum CO. Chicago, IL USA  30's-40's External Clamp-On Felt Moun Muffler.    Condition is "Used" and Sold as is. The felt needs replacing. There is rust and pitting from age and use. As you can see in the last picture there is a peel in the metal on the round section at the edge.  Please look at pictures carefully and ask  questions before you buy . Buyer pays return shipping.  Thanks for viewing.