When Herr Flick and Herr von Smallhausen join the monastery in the previous episode, Fleeing Monks (1991), they are told they must give up all worldly possessions, including their glasses, which the monk smashes on the floor. Here we see they both have their glasses back.
The song "The Happy Wanderer" by Friedrich-Wilhelm Möller and Antonia Ridge that's performed by Carmen Silvera and Gorden Kaye in this episode, was actually written a few years after World War II.