This is actually a map of the Netherlands and I’m from there. I’m also old enough to remember a time without mobile phones. This was probably the call centre for triple AAA, in Dutch the ANWB. We had these emergency telephone poles along the highways. When stranded (car broke down) and without a map you could easily call aid through them with these phones, which they also knew where they were, for easy dispatching.
Can you Anglo-Saxons stop hating each other? One was so prude they left, the other stayed and fought the prudes where they went. Still the same kitchen. /s