That muted was trumpet sound of the 60s was all the rave with none better than the big band player by the name of Clyde McCoy.
This prompted Vox to develop a pedal that emulated the trumpet was in an effect pedal. Jimi Hendrix and Eric Clapton used the Vox Clyde McCoy wah. Photos taken during recording of "Electric Ladyland" document Jimi's as being the "signature" model, featuring Clyde McCoy's name written out script style on the bottomplate.
Fast forward to now and the Fulltone company perfected the Clyde wah from taking the best aspects from up to 25 vintage Vox wah pedals and producing this amazing Clyde Standard Wah Pedal. Unfortunately some vintage wah pedals perished during the quest for the ultimate wah tone.