De Experimentele Groep at the studio of Karel Appel, 1948

De Experimentele Groep at the studio of Karel Appel in Amsterdam, 1948.
Standing f.l.t.r.: Anton Rooskens, Jan Nieuwenhuijs, Eugène Brands, Karel Appel, Theo Wolvecamp
Sitting f.l.t.r.: Corneille, Gerrit Kouwenaar, Jan Elburg and Constant playing guitar.