2 X 10 East Africa cents tied together!

Hi everyone!

I got these two coins from another collection like this - tied together!

The coins are one from 1942. and the other from 1956.
The rope itself looks quite old as well, but i really don't know if there's some reason why those coins are tied together, or is that just something that happened.

Does anyone maybe know if there's a story behind?

Thanks!