@rijksmuseum_roulette You have a key, just a key -- not the thing with the lock that it fits in? And it is on loan from somewhere else -- do _they_ have the thing with the lock that fits it?
Is this some kind of "time capsule" thing where they put stuff in a box and lock it, and then give the key to the Rijksmuseum so that the box can only be opened when the key comes back?

It's making me anxious.