"It's an older code skipper, I can't figure it out."
"You. Higher Mammal. Can. You. Read?"
(Somone please translate)
Nothammer is german for "emergency hammer", the Not- prefix stands for "emergency" and is related to the english word "need". This sign was likely found in a train next to a window that you break in case of emergency
(Nothamer = Emergeny Hammer in German)