Seems these are all from 1937. Describing a night out in Apr 1937: 'There were also about 200 propaganda leaflets from the Fatherland Front on the local street, including a donkey with a swastika and the inscription "Are you still with the NSDAP?" (via: https://museum-oberschuetzen.com/kontakt/images/Museumsbl%C3%A4tter5.pdf)