My Grandpa and Grandma, Germany, ca. 1925, the bike may be a German Hercules? But I'd like to find out more. Any help appreciated!

https://i.redd.it/f9zk6i75d0b21.png via /r/motorcycles https://www.reddit.com/r/motorcycles/comments/agzcvv/my_grandpa_and_grandma_germany_ca_1925_the_bike/?utm_source=ifttt