@flugelgirl said in 3rd Valve for Olds Recording Trumpet?:
@Dr-GO looks like he’s looking for a 3rd valve slide, not a piston. Might be difficult to come by, though Allied might carry a compatible part. Only a shop with an account number can order from Allied, so check to see if it’s possible to do that.
Oops.. my dyslexia is kicking in. That slide does have a screw trigger mechanism so would not be as easy as a fix as sure.
