TECHNICAL SPECIFICATIONS
- Key :Bb 
- Series :Challenger 1 
- Bore :.459" / 11,66 mm ML bore 
- Bell :4.803"/ 122mm #37 yellow brass or gold brass 
- Valves :3 top-sprung hand-lapped Monel pistons 
- Water keys :2 lever-style, forged (main tuning and 3rd valve slide) 
- Features :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, one-piece hand-hammered yellow or gold brass bell 
- Outfit :Hard wood-shell case, Mouthpiece, valve oil, slide grease, cleaning cloth and rod 
- Finish :Silver plated 
- Models : 
- BS3137-2-0 :Silver plated finish 
 
                         
        