This is a Bach 42AF large bore tenor trombone in super mint condition, built within the past five years and played for only about one. It features a .547" bore, 8.5" yellow brass 42-series bell, and a standard 42 handslide paired with the renowned O.E. Thayer axial flow valve. The open, free-blowing response of this valve design has made it one of the most sought-after alternatives to traditional rotary valves, offering smoother airflow and quicker transitions when engaging the F-attachment.
This instrument has been fully cleaned and serviced and requires no further work — it’s performance-ready. The slide is flawless, fast, and tension-free, and the valve is quick and airtight. This particular 42AF plays with remarkable clarity and breadth across all registers, making it a top-tier choice for orchestral, wind ensemble, and solo work.
Cosmetically, the trombone shows minimal if any signs of use. The lacquer is bright and even, and the handgrip area shows virtually no wear. The horn includes its original Bach case in perfect condition and a mouthpiece of your choice (please call or email to discuss available options).
A new Bach 42AF currently retails for well over $3,800, and with any new horn there is always the uncertainty of how it will play until it arrives. This particular instrument has already proven itself — and like all of our professional trombones, it was covered by our 7-day in-home trial and return policy at the time of sale.
📖 This Bach 42AF has found a new home and now remains here as a reference for collectors, enthusiasts, and returning players. Looking for a professional large bore tenor trombone? Browse our current inventory here 🔎
🤔 Why choose a Bach 42AF with O.E. Thayer valve?
Many players prefer the O.E. Thayer axial flow valve for its open, smooth response and low resistance, which feels more natural when transitioning in and out of the F-attachment. Compared to traditional rotary valves, it offers faster airflow and a more centered tone. For orchestral players who demand precision and evenness across all registers, the Thayer valve has become one of the most respected designs available.
