This case's basic design was used for many compasses also made by PASTO, WILKIE and FPM after WWII.

BUSCH was deeply involved in equipping the youth organisation JUNGENDIENST, that replaced the boy scouts (Pfadfinder) organisation and provided a paramilitary training although politically differing from the Hitler-Jugend. In this organisation's manual ("DEUTSCHER JUNGENDIENST", 1933) it is said that the Jungendienst compass was especially developed for the organisation.

(courtesy http://www.compassmuseum.com/)