Danish challange coins?

I recently purchased an insignia lot, and among the items was this thing:






Now, I know the Danish 'Jægerkorpset' or Special Forces members, even when retired, always carry their personal regiment coin embossed with their individual number, at all times. But was not aware there was such a tradition among more conventional part of The Royal Danish Army.
It's a real beauty though, very well crafted.

Now that I have it, someone must be buying lots of rounds of beers somewhere