Holton TR-156 from the 1970s. Originally built as a straight large bore tenor trombone, this instrument has been thoughtfully modified with an F-attachment rotor section from a Bach 50, Mt. Vernon NY era.
It features a 9" rose brass detachable (screw) bell flare, a design element that offers both practical and acoustic advantages. The detachable bell makes transport easier and can subtly influence balance and resonance.
The handslide is a standard Holton nickel silver dual bore model (.547/.562), giving this trombone a very large, warm sound. When paired with a larger mouthpiece, it plays more like a small bass trombone — ideal for players seeking extra depth and flexibility without moving fully into bass territory.
This horn plays big and full, with a gorgeous warm tone and excellent projection, perfect for orchestral, large ensemble, or commercial contexts.
Original case included.
When did detachable (screw bell) trombones become popular, and why do players choose them?
Detachable bell (screw bell) trombones have become increasingly popular in recent years, especially among traveling musicians who need a more compact case. While French horns have used detachable bells for decades, trombone screw bell designs have existed in some form for a long time — as this vintage Holton model proves. Early examples, like this 1970s Holton TR-156 with a detachable rose brass bell flare, show that makers were experimenting with this concept well before it became widespread. Today, players appreciate the detachable bell for its convenience and its subtle effect on weight balance and resonance. Many modern orchestral and commercial players now choose screw bell trombones for both practical and tonal reasons.
This Holton TR-156 Trombone is now part of our Archive of Sold instruments.
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