Agnes Martin # the ISLANDS# original silkscreened poster, 2004, mint-
Benjamin Katz # ANDY WARHOL # 1989, mint
Bottrop Quadrat # James BISHOP # signed, 2007, mint
Josef Albers Museum # ANNI ALBERS photo, Change of Address # card, mint
Josef Albers Museum # FRED SANDBACK # 2014, mint
Josef Albers Museum # PATRICK FAIGENBAUM # invitation, 2021, mint
Josef Albers Museum #JOHN SZARKOWSKI # 2009, mint
Josef Albers Museum, Bottrop # DONALD JUDD # after JUDD design from 1977, 2008. mint
Josef Albers Museum, Bottrop # Josef LEPORELLO # mint
Josef albers Museum, Quadrat Bottrop # JERRY ZENIUK # signed, 2016, mint
Josel Albers Museum/ Quadrat Bottrop # original silkscreened print WALTER LEBLANC # 1989, mint-
Quadrat Bottrop # ANDREAS CHRISTEN # poster, 1993, mint
Quadrat Bottrop # HIMSTEDT / EGAN # 2021, poster, mint
Quadrat Bottrop # JOACHIM BROHM # poster, 2007, mint
Quadrat Bottrop , Josef Albers Museum # ANTON STANKOWSKI # poster, 2006, mint
Quadrat Bottrop, Josef Albers Museum # BEN WILLIKENS # 2002, mint
Quadrat Bottrop, Josef Albers Museum # Edward Quinn, PICASSO # poster, 1995, mint
Quadrat Bottrop, Josef Albers Museum # JONAS WEICHSEL # poster,2018 , mint
Quadrat Bottrop, Josef Albers Museum # KURT KOCHERSCHEIDT # poster 2013, mint-
Quadrat Bottrop, Josef Albers Museum # ULRICH ERBEN # 2019, poster, mint