1) Affordable artwork 2) Art piece 3) Art purchase 4) Art shop offering 5) Big colored poster 6) Collectible print 7) Graphic opening 8) Kind of graph or sphere 9) Kind of print 10) Meteor or sphere leader 11) Museum print 12) Numbered work, often 13) Oft numbered print 14) Often numbered print 15) Often-numbered print Found on https://www.crosswordclues.com/clue/litho