Bobby Hackett - Soprano trombone ad

Here's another treasured gift from Fernando Ortiz de Urbina's collection of 50's & 60's Downbeat issues. It's an advertisement, published on January 8, 1959, of what is called a "Bb slide trumpet" but is, in fact, a soprano trombone (also pitched in Bb), as some research on several trumpet & trombone websites prove [check, for example, 8notes.com]. Not only Getzen, but also Jupiter and other brands marketed it as a "Bb slide trumpet" which was actually a baroque instrument.