H.N. Werkman (1882-1945). Three bookplates

1) Ex libris Halbo Kool. Bookplate, (1931), 14 x 11.3 cm, printed in black and red; 2) Ex libris P.J. Hiemstra, (1936), 11.5 x 7.9 cm. Printed in 5 colours; 3) Ex libris Hiemstra. (1934) 10,5 x 7.4 cm, printed in blue, yellow, black and red.

All in passe-partout. (total 3)