Lot of 3 vintage Dutch modernist button display cards, with 30 different plastic buttons.  Each of the 3 stiff heavy cards measures 8" x 1-1/2".  The buttons are sewn onto the cards with fabric backgrounds, and some of this 1950s fabric has badly deteriorated, other parts are nice and show what should have been without age.  All 30 of the colorful buttons are in very good condition and the cards have super graphics and marked KAHA.  There are also fainter inventory stamped and penciled numbers on each card.  Back of each card has inked "Amsterdam 2001" mark from previous owner purchased at antique market.