Maybe I can help. This date was recorded in 1963 at Monmartre Jazzhouse in Copenhagen,Denmark. The Danish house rhythm section consisted of Bent Axen on piano, the very young ( not yet 17) Niels-Henning Orsted Pederson on bass and William Schiöpffe on drums.
Probably recorded for Danish Radio it was subsequently released on Black Lion label untitled "Walkin".