This vintage King 3B with F-attachment was built in the mid-1970s, during the period when King produced some of its most consistent small-bore jazz and commercial trombones. It retains the classic .508" bore and approximately 8" bell that define the 3B feel, paired with the added versatility of an F-section for extended low range and smoother alternate positions.
This example was freshly cleaned and serviced here at The Brass Exchange. The slide action is very good—fast, smooth, and aligned—with no loss of inner slide plating. The original honey-colored lacquer, typical of 1970s King finishes, shows honest wear in the usual contact areas but still presents well. The handslide end crook has a couple of tiny marks that were intentionally left untouched, as the alignment is excellent and should not be disturbed. Overall, this is a strong, reliable example from an era admired for tight craftsmanship and lively playing response.
The 3B with F-attachment is a great choice for advancing students, come-back players, or working musicians who prefer a small-bore horn but want the added flexibility of a trigger. It performs well in jazz ensembles, commercial work, pit orchestras, section settings, and anywhere a large-bore tenor might feel too broad.
Includes an older-style Protec case. Mouthpiece not included.
Q: Is a mid-1970s King 3B with F-attachment still considered a good horn today?
A: Absolutely. These vintage 3B-F models remain popular because they keep the classic 3B feel—centered, nimble, and vibrant—while expanding the low register and improving ergonomic versatility. Many players prefer the build quality and lacquer character of these 1970s instruments over more recent production.
All images on this page were taken during an earlier era of our photography workflow. These legacy photos remain intentionally preserved to document the original listing and to support research into vintage lacquer colors, engraving styles, and hardware details from this period. 📌
This listing is now part of the Archive of Sold Instruments at The Brass Exchange and remains available as a reference resource for players researching vintage King trombones, historical specifications, and real-world performance characteristics.
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