When did Peter Green start playing with a wah wah?

[THD]

My recollection is that he used wahwah during the Manalishi extended jam where he played his Fender VI bass (IE wahwah pedal with the bass) April !970 Lyceum Ballroom Not the earliest, but possibly interesting to know he used it on this instrument I don't recall him using it with straight guitar that night! Do recordings exist of him using the Fender VI with a wahwah pedal ?(However please note, that until reminded I completely forgot Nick Picket , violinist played in Peter Green and friends that night until reminded about it after I posted about that concert !)