Krüger visited several other concentration camps to assemble the people he needed, primarily selecting those with skills in draftsmanship, engraving, printing and banking. In September 1942 the first 26 prisoners for Operation Bernhard arrived at Sachsenhausen; 80 more arrived in December. When met by Krüger, he called them in the formal and polite form , rather than the more demeaning , which was normally used when the Nazis spoke to a Jew. Several of the prisoners selected later reported that Krüger had interviewed them for the role, and treated them with politeness and good manners. He also provided the prisoners with cigarettes, newspapers, extra rations and a radio. Prisoners had a ping pong table, and they would play with the guards and among themselves; evenings of amateur theatricals also took place, staged by the prisoners, with a mixed audience of guards and counterfeiters; Krüger provided musicians for musical numbers.