[Art Nouveau] Twelve ex libris: (1-2) Emil Orlik (1870-1932) "Ex libris Dr. Rud. Neumann"

Two differently col. variants of the same lithogr. ex libris, both 12 x 7 cm, monogrammed and dated "01" in the technique, both with various (orig.? ) signatures in pen verso: "E. Orlik fec. Prag" (w. glue in upper margin verso) and "Emil Orlik Prag" (tipped onto mount).

(3) Alfons Mucha (1860-1939). "Ex libris Vostrebal". Zincography, 12 x 6.7 cm (sheet size 15.3 x 11.5 cm), signed in the technique, tipped onto mount. -and 9 others in Art Nouveau style, all but 2 tipped onto mounts, by a.o.: Hans Oltmann (1872-?) (two variants of the same ex libris, dated 1902); Francis Oppenheimer (1870-1961); and Theo Neuhuys (1878-1921) (2). (total 12)