.459" / 11.66mm ML bore
4.782" / 122mm #37 one-piece hand-hammered yellow brass bell
3 top-sprung hand-lapped Monel piston valves
2 lever-style, forged water keys (main tuning and 3rd valve slide)
Standard gold brass lead pipe and tuning slide bow
Adjustable rod stop on 3rd valve slide
Thumb saddle for 1st valve slide
Maintenance-free rubber valve cap in-lays
Silver-plated finish
Includes hard wood-shell case, mouthpiece, valve oil, slide grease, cleaning cloth, and rod
The B&S 3137 Challenger I trumpet is 100% German-made and holds true to the brand’s 250-year-old tradition of making high quality brass instruments. The 3137 is a professional Bb trumpet with classic and familiar ergonomic features.

The 3137 features a very unique one-piece hand-hammered bell made in the traditional way using the knowledge of skilled master craftsmen at B&S who use hand-on techniques. This allows the trumpet to be full of rich colors and resonate freely with a wide array of characteristics.