[Merlin]

he played Conns, the model that came after the 12M, which is now often called the "Mulligan Model". He had two of them i know of, the first one was in silver plate, and the other was in gold plate

Martin Williams

Mulligan's horns were not post-12M. They were 12M's. That was the model designation for Conn bari's for a very long time, even through the changes in bell key location and for models with and then without rolled tone holes.