Amazon.com: NEW SILVER Bb FLAT ECHO CORNET+FREE HARD CASE+MOUTHPIECE : Musical Instruments
Reidl Echo Cornet — Robb Stewart Brass Instruments
ECHO CORNET Bb PITCH RED BRASS WITH CASE AND MP nice instruments | eBay
National Music Museum (NMM) - The earliest American instrument with an echo attachment known to survive -- this rare 1851 Graves echo cornet in E-flat (high pitch) at the National Music Museum (