Bach 42BO | Serviced, Pre-Owned
This is Bach’s classic tenor bass trombone, known as the standard instrument for orchestra musicians worldwide.

• Serial Number 79637 (Body) / 129755 (Slide)
• Lacquer finish
• Serviced (Cleaned, rotary and slide adjustments performed on September 11, 2026)
• Case included
• Tested (September 11, 2026)

[Model Features]
The 42BO is a wide-bore tenor trombone from Bach’s top-of-the-line Stradivarius series.
It features an open-wrap design—a variation of the F attachment on the legendary 42B with a gentler wrap—which retains the 42B’s tone while offering a more open playing feel.
It is a classic model that has long been used as the standard instrument by orchestra players worldwide.
It is characterized by a wide dynamic range and a warm, powerful tone.
Bore: 13.90 mm (wide bore)
Bell: 8-1/2 inches, yellow brass bell
[Serial Numbers]
79637 (Body) / 129755 (Slides)
[Finish]
Lacquer
[Service History] (Performed on September 11, 2026)

• Cleaning
• Rotary valve adjustment
• Slide adjustment

[Condition]

• The exterior shows signs of use.
• Minor scratches from use are visible.
• There are numerous areas of discoloration and lacquer peeling.
• The condition of the slide is rated at about an 8 on a scale of 10.
• There is a dent on the top of the slide.

[Important Notes]

• The instrument will be shipped in the exact condition described, including its appearance and the condition of the slide.

[Accessories]

• Case

[Recommended For]
Suitable for intermediate to advanced players looking for a large-bore tenor bass trombone for orchestras or wind ensembles.
Also recommended for those seeking a classic sound.
All used instruments we sell are serviced by a repair technician before delivery. We are also available to consult on adjustments after your purchase.