Theo with his Combo:

 

These are recordings I found in a forgotten drawer. Poor quality but really nice regardless.
They are a number of different combos but the line-up he used the most was:
Frans Pelgrims Drums, Jang (?) on bass, Paul Quintens on keys, Eddy House on alto sax and clarinet, Eddy De Vos on tenor sax, Frans Van Dyck on trombone, Theo on trumpet.