Conn-Selmer #4 cornet Mouth Piece Vintage Metal 2.5 Inch Longshort shank cornet mouthpiece for Conn cornets made before 1958The markings "Conn 4" on a vintage trumpet mouthpiece indicate that it is a Conn 4 mouthpiece. Conn 4 mouthpieces were made by the Conn-Selmer Corporation from the early 1900s to the mid-1960s. They are characterized by a medium-sized cup diameter and a shallow cup depth. Conn 4 mouthpieces are known for their versatility and their ability to produce a variety of sounds. They are a popular choice for both classical and jazz musicians.Here is a more detailed breakdown of the markings "Conn 4":Conn: This is the manufacturer's name. Conn-Selmer Corporation is a major American manufacturer of musical instruments.4: This is the model number. Conn 4 mouthpieces are medium-sized cup diameter and shallow cup depth.If you are looking for a versatile and well-made trumpet mouthpiece, a Conn 4 mouthpiece is a great option.*Please see the photos for the condition and more details. Writing on item packages such as pricing or condition is most likely old and out of date, so please ignore it. Does not include the photo board used to take photos of coins, you get just the coins.*Any weights or measurements are approximate