I have performed this concerto with orchestra on a Besson Sovereign Eb, also on an old Mirafone 180 F. I am playing it these days on a Yamaha 621 F, or a super 3 valve Imperial Eb.
In the case of the low notes on the three banger, I play them as fake notes and don’t attempt to compete with the orchestral tutti. Quite acceptable, if you don’t mind the timbre difference (on the very few notes that do occur).
Schmenge Kaiser EEb, 3 valve (two rotors, one piston), with a Kosicup mouthpiece (9.2 mm)