Used Courtois AC420R Professional Bb/F (Gb, Flat G) Tenor Trombone (SN: 43258)

Used Courtois AC420R Professional Bb/F (Gb, Flat G) Tenor Trombone w/custom “Instrument Innovations” rotor valve section in brushed lacquer. .547” bore hand slide, open wrap rotor valve section with tuning slide for keys of F, Gb and Flat G, 8.5” gold brass bell flare. Standard Hagmann valve section replaced with Instrument Innovations rotor valve section and bracing has been modified to match 421 New Yorker model. Instrument is in good condition apart from minor lacquer wear throughout. No case.