Is bigsby vibrato or tremolo

this is an easy one: all wang bars are vibrato systems.... even the fender strat's so-called 'syncronized tremelo' is a vibrato, that's change in pitch over time versus trem which is change in amplitude over time.... fender wasn't a musician and he called the tremelo on his amps vibrato and the vibrato on his guitar tremelo, he didn't know any better.... only the harmonic vibrato on the larger brownface amps approaches true tube vibrato but its not really, the only true vibrato amplifiers I can think of are the magnatones and the vox ac line, the vintage ones like my 62 which has an all tube vibrato design ripped off of the hammond organ design that predated the leslie cab

but ALL whammy bars of any type are a form of mechanically produced vibrato

and blackface fender amps have?