This Bach 50B comes from the highly regarded “Corporation” era of the late 1960s, a period many players and collectors consider a sweet spot for Vincent Bach production after the move from Mt. Vernon, NY to Elkhart, IN (1965). Instruments from these years are known for consistent build quality, tight tolerances, and that unmistakable Bach core—broad, resonant, and stable at volume without losing color at softer dynamics.
This example presents exactly as a strong single-valve 50 should. The bell is true and responds easily, with a centered low register and plenty of headroom up top. The handslide is straight, fast, and quiet; stockings are clean with no chrome loss. The rotor section was fully serviced here, and we improved the linkage—action is quick, smooth, and quiet. In short: a confident, orchestral-weight single that’s also friendly in large jazz or pit settings.
Players considering single vs. double valve: a well-set-up single 50B covers all the standard F-attachment notes cleanly (low F, E, E♭, D, D♭, and down to C with appropriate positions). If you rarely need low B-natural or extended trigger-trigger combinations, a single can feel more open and agile while keeping the horn lighter and better balanced. That’s part of why these Corporation-era singles remain so popular with section players and doublers.
Cosmetically, this horn shows honest, light age consistent with its era, but nothing that distracts on stage. Mechanically and acoustically it’s in excellent playing condition—exactly the kind of 50B we like to see come through the shop.
Includes the original case.
This listing is kept here as part of our historical reference. If you’re searching for a comparable Bach bass, or want guidance on whether a single or double valve best fits your work, we’re happy to help match you with the right instrument.
This Bach 50B has been sold and is now shown here as a historical reference in our Archive of Sold Instruments. 🔎 Browse available trombones at The Brass Exchange
What is special about a Bach 50B from the 1960s Corporation Era?
The late-1960s “Corporation” era followed the move from Mt. Vernon, NY to Elkhart, IN in 1965. Production was highly consistent, with instruments retaining much of the Mt. Vernon tonal character but benefiting from expanded manufacturing capabilities. Many pros still seek these horns for their balance of warmth, projection, and craftsmanship.
How does a single-valve 50B differ from a double-valve bass trombone?
A single F-attachment 50B provides all the standard trigger notes (low F, E, E♭, D, D♭, and C) while keeping the horn lighter and more free-blowing. Double-valve models add a second trigger for low B-natural and alternate positions, but some players prefer the quicker response and open feel of a single rotor.
Is this model suitable for orchestral work?
Yes. The 50B is Bach’s flagship bass trombone, and in the right hands, a single-valve version can handle most standard orchestral repertoire. Players who rarely encounter low B-natural passages may find it more comfortable than a heavier double-valve.
What makes this particular 50B a good example?
This horn has a straight, responsive bell, a slide with no chrome loss, and a freshly serviced rotor with upgraded linkage. Mechanically, it’s set up for professional performance, and its 1960s build quality is widely regarded as among Bach’s best.
