Model: 28A Connstellation Cornet
The 28A Connstellation, the cornet version of the 38B Connstellation trumpet. It would be more accurate to say the 38B Connstellation trumpet is the trumpet version of this cornet, since the 28A was first produced in 1955 while the 38B didn't appear until 1956. The 28A Connstellation has been described as the "secret weapon" or "hidden gem" among the Connstellations. I know of several people who prefer it above the 38B Connstellation trumpet. For one, by using various different mouthpieces the sound can varied between bright trumpet and mellow cornet, much more so than on a trumpet. Also, if you buy a 28A you will almost certainly always have an Elkhart instrument, since the 28A was probably discontinued when Conn moved to Abilene, TX. Used, no case.
From the Conn Loyalist: