Malta 50c Coin 1991 - Huge Rotation Error

I just noticed this coin has a huge rotation error - about 75 degrees. I'm interested if these errors are known or have already been found. What would the coin be approximately worth? Here some pictures:

Here a link to the page:

N#1783

Greetings from Bavaria

Hallo,

such errors are very common, the value of the coin doesn't really change, except if you find somebody with a special interest in misaligned coins, but those kinds of collectors are rare to find…… I for example just add a comment in my rotation column in my excel as m70 = 70° from medal or c30 = 30° from coin orientation, and that's it.

Gruesse aus Paris