Keefer, BB flat sousaphone, 3 rotary, c.1920 Tag #: 00049 Serial #: Bell Diameter Bore Size 24″ .729″ Comments: “Brua C. Keefer / MAKER / Williamsport / pa” on bell. Emblem and ornate floral enraiving around identification marks. Floral engraving around clock spring housing. Share this:TwitterFacebookLike Loading...