Olds Opera Premiere 368 bore. Nickel silver matching valve numbers serial number dates to 1951 ornate top and bottom caps mother-of-pearl inlay pull buttons, octagonal top caps bottom caps and buttons,beautiful sounding horn i\'m just looking for something lighter and brighter that sizzles don\'t get me wrong this one will project and the registers are no problem! my other horns are Olds, All valves and slides work smoothly 99% nickel silver gold plating. Few scratches from normal wear. thanks for looking,the pictures don\'t do it justice! Oh comes with old Olds case! Thanks for looking!