Brussel, Belgium – 1905
Helsinki, Finland – 1909
Gent, Belgium – 1911
Rotterdam, The Netherlands – 1923
Tilburg, The Netherlands – 1924
Lille, France – 1932
Noordwijk, The Netherlands – 1917
Charleroi, Belgium – 1936
Radio Kootwijk, The Netherlands – 1923
Rijswijk, The Netherlands – 1911
Etten-Leur, The Netherlands – 1924
