Overview
This Paris-made Antoine Courtois 420BE professional large-bore tenor trombone, serial number 343344, received full shop service before being offered by The Brass Exchange, including chemical cleaning, rotor service and slide adjustment.
The 420BE features an open-wrap F-attachment, .547-inch large-bore slide, traditional rotary valve with mechanical linkage and an 8½-inch yellow brass bell. The instrument also features a lightweight outer slide, Saturn water key and curved hand grip for added comfort.
Courtois trombones have never been especially common in the United States, but those familiar with the brand understand that these instruments belong firmly in the professional category. Most importantly, this trombone played exceptionally well and was ready for immediate use.
This instrument has been sold and is preserved here as part of The Brass Exchange Archive of Sold Instruments.
Condition Summary
Condition was very good overall, with only minor cosmetic wear consistent with normal use.
The slide was one of the strongest features of this instrument. It was straight, true, properly aligned and free from inner-slide tube plating defects. There was no evidence of prior slide damage.
The rotor operated properly, the linkage was responsive, and all playing components were serviced and inspected before the instrument was offered for sale. Some lacquer loss and early natural patina were visible on portions of the bell flare, giving the instrument character without affecting performance.
A Protec Max case in excellent condition was included.
Player Perspective
This was the type of instrument that made a great deal of sense for a player who wanted a professional tenor trombone but did not necessarily need to purchase a factory-new instrument.
It was an excellent choice for an advancing student moving into a first professional-level trombone, as well as educators, serious amateurs and professional musicians seeking a dependable large-bore tenor for orchestra, concert band, chamber music, church ensembles, solo literature and musical theatre work.
At this level, the discussion becomes less about brand recognition and more about playability. Does the instrument respond properly? Is the slide excellent? Does it produce a broad, open sound and allow the player to perform with confidence?
This Courtois checked those boxes. The response was immediate, the sound was centered and open, and the instrument felt every bit like the professional tenor trombone it was designed to be.
Value Perspective
When this instrument was offered for sale, current-production Courtois 420-series professional tenor trombones sold for substantially more, depending upon configuration and valve design.
This Paris-made 420BE offered an opportunity to acquire a professional European-built tenor trombone at a fraction of the cost of a comparable new instrument.
For players shopping in the same general range as a nice used Bach 42BO, Conn 88H or Yamaha Xeno, this Courtois deserved serious consideration. It was a professional-level instrument that remained somewhat overlooked in the United States, creating an excellent value opportunity for the right player.
What Was Included
- Antoine Courtois 420BE professional tenor trombone
- Protec Max case
- Mouthpiece not included
Questions Players Often Ask
Was this a professional model?
Yes. The 420BE is a professional large-bore tenor trombone built in Paris, France.
Had the instrument been serviced?
Yes. The instrument underwent complete shop service before being offered for sale, including a chemical bath, rotor service and slide adjustment.
How was the slide condition?
Excellent. The slide was straight, properly aligned and free from inner-slide tube plating defects.
Was this a good choice for an advancing student?
Yes. This was an excellent first professional-level tenor trombone for a serious advancing player.
What type of valve did it have?
The instrument featured a traditional rotary valve with mechanical linkage and open-wrap F-attachment tubing.