I didn't have very long to look but I couldn't help hoping there might be a husky. And behold!
My curiosity was sufficiently piqued for me to spend some time in the company of Messrs. Google and Wikipedia on my return. With their help, I've discovered that what I have is a fève, literally 'broad bean': a favour that would be baked into the King Cake on Twelfth Night for one lucky consumer to find. (I now remember reading about this tradition some years ago in The Happy Orpheline.)
Delightfully, if you collect fèves (I'm tempted now - there's an Inspector Gadget set!), you are a Favophile.