This is listed as an EEb tuba, presumably meaning an Eb tuba. However, the photos look more like a Bb euphonium to me. Is it possible to tell the difference from the photos? If it is an Eb tuba I am thinking about placing a bid.
https://www.ebay.com/itm/Boosey-Hawk...wAAOSwn6hgX2En
Also, looking at the slides, some of them look a little odd. I wonder if it is an older instrument that had the slides modified so it can tune to modern (A=440) pitch.