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 (
Shreyas Bb Flat Brass Finish Echo Cornet With Free Case Box & Mouthpiece : Musical Instruments - Amazon.com
Amazon.com: OSWAL Bb Flat Brass Finishing Echo Conret With Free Hard Case+Mouthpiece : Musical Instruments
Bb FLAT BRAND NEW ECHO CORNET FREE HARD CASE | eBay
Echo cornet, nominal pitch: C etc"
Echo cornet. - Detail
Echo cornet - Detail
Echo Cornet
Amazon.com: NEW SILVER Bb FLAT ECHO CORNET+FREE HARD CASE+MOUTHPIECE : Musical Instruments
Echo cornet, nominal pitch: C etc"
ECHO CORNET Bb PITCH RED BRASS WITH CASE AND MP nice instruments | eBay