Dick Bos
Maz Bibliotheek no. 4, 1963. Near-impossible to find first no. from the Ruitreeks. Some minor damage to cover, else good*. Added: Opium, no. 6. Some damage to cover, price crossed out, else good.
*The transition from the previous series to the "Ruitreeks" was carried out by replacing the old stock only when it was sold out. This way, several numbers were never published as they were still in stock, and several of the first numbers from the Ruitreeks were published in an exceptionally small number of copies. Number 4 is the most rare of these numbers.
(total 2)