This is what I think of as the "other" Willson. It has a large shank receiver and a larger bell than the 2900 (the most common model). I've had 2 students who used this model, so I have had chances to play theirs plus others I found on displays. They have a larger sound than the 2900 and a very free response. This horn is from a U.S. seller and is fine condition. He has the price set really nicely, at $4,199.95 for "buy it now." That is a great price for this horn, so if you are interested DON'T WAIT.
SOLD FOR $4199.95
https://www.ebay.com/itm/114967760020