For those who want a pro-quality horn but who don't like the compensating system, this might be the instrument for you. A former colleague in the band, Roger Behrend (who went on to be soloist with the Navy Band), loved this horn and said it played like the 2900 but was non compensating. It does share the same bore measurements as the 2900, I believe. Condition looks quite good and a hard case is included. Buy-it-now price is $1,999, and there IS a make-offer button.
ITEM SOLD FOR $1,600
https://www.ebay.com/itm/Willson-2704S-Professional-Non-Compensating-Euphonium-SN-10881-EXCELLENT/263985880242