ex libris a.o # PAM G. RUETER #Walburg pers/sealed , 1990mint
J. Havelaar # POSTAGE PAID, First dutch stamp#2002, Mint
Joods Historisch Museum, Zweers # KURT LUBINSKI , Fotograaf in Exil # 2008, mint
Walburg pers # JAN ROZEBOOM # 1983, nm