Board Thread:Questions and Answers/@comment-101.181.141.122-20160524105102/@comment-26828130-20160524115401

Yes, that's a reawrd item that can be sold (rewarded by Steam Dome achievement, not Johann ;) )

You could try to contact Support and ask for it Maybe if you tell them you've deleted them by accident, you get it back for free, but don't count on it