This is a Bach 42BOF large bore tenor trombone with the Meinlschmidt-designed Open Flow rotor valve and European-style open wrap F-attachment. Built as an upgrade to the standard 42BO, this model offers a smoother, freer-blowing response and quieter valve action that many professional players prefer for orchestral and symphonic performance.
This particular example, serial number 219822, was purchased new and played only lightly by its original owner. It remains in super mint condition with flawless lacquer and no prior damage, repairs, or wear. Unlike “open box” or demo models, this horn was sold as a factory-new instrument and has never been discounted or relabeled as B-stock.
It features the classic one-piece 8.5" yellow brass 42 bell finished in clear lacquer, paired with a standard-weight .547 handslide. The slide has been professionally set up in-shop for optimal action and responsiveness. The inner tubes are clean and straight, with no plating loss or alignment issues.
This 42BOF comes with its original Bach hard case in perfect condition. A mouthpiece is not included.
For players seeking a modern refinement of the legendary Bach 42 design, the 42BOF delivers. It retains the familiar tone and projection of the traditional 42B while offering a more open feel and smoother transitions through the F-attachment.
A brand-new 42BOF retails for over $4,800, making this super mint example an outstanding value when it was offered.
📖 This Bach 42BOF has found a new home and now remains here as a historical reference for collectors and professional players. Looking for similar professional large bore tenors? Browse our current trombone listings here 🔎
🤔 What makes the 42BOF different from the standard 42BO?
The 42BOF uses a Meinlschmidt Open Flow rotor, which is smoother, quieter, and more free-blowing than the traditional Bach rotor. It also uses a European-style open wrap, which provides less resistance and quicker response, especially in the low register. Many players find it more comfortable and efficient than the standard 42BO design.
🤔 What does “open box” really mean when buying a trombone online?
The term “open box” can be misleading. It may refer to an instrument that was returned after short use, a demo model, or even a unit with cosmetic flaws or subtle defects (like a misaligned slide) that required rework. At The Brass Exchange, we prioritize clarity and quality — our customers expect professional-level instruments to be in top condition, and this 42BOF met that standard in every way.
