Duo consisting of [https://musicbrainz.org/artist/b5985baa-de4c-455b-80fd-25a8b47115fb|Bob Scholte] and a female singer, possibly Ferry van Delden’s (then) wife Mietje Maas (based on [https://data.jck.nl/page/aggregation/jhm-avm/20001246|this source], but I can’t find any other sources). [https://secondhandsongs.com/artist/97868+127771|SecondHandSongs] lists Tiny Lavell, Van Delden’s later wife, who was a singer and actress (and I can find a few newspaper articles about nights where both she and Scholte performed, but never mentioned as a duo).