B ♭ / Convertible model. The valve system is 3 pistons. ...
B ♭ / Convertible model. The valve system is 3 pistons. ...
B ♭ / Valve system is vertical type 3 piston. Bell is ...
B ♭ / Convertible model. Valve system is 4 pistons. The ...
E ♭ / Convertible model. The valve system is 3 pistons. ...