Can any of my fellow mello/horn players figure out what exactly this thing is (ignoring the taped second valve)? Cause I know it's some sort of mellophone thing. Details in the comments
King 1121SP Ultimate Professional Marching Mellophone - Silver-plated | Sweetwater
Yamaha YMP-201M Marching Mellophone Lacquered Brass | Reverb Deutschland
John Packer JP2051 Marching Mellophone - günstig kaufen im Online-Shop für Musikinstrumente, 891,00 €
1000M Series Marching Mellophon | JUPITER Blasinstrumente