The Narwhal Horn

On a prior trip to Italy I found a number of folders in an archive, that seem to detail the Top Italians' involvement with some kind of expedition to the North Pole, or at least as far north as Greenland.

In one of the envelopes I also found a key to a safe deposit box which contained an actual narwhal horn??

I have no idea what to do with this now... I feel like I should donate it to some kind of museum!