This coin is made from an empty Casascius 5 BTC coin, with a ‘Nasty Mining’ hologram added to the back. The public key is printed onto the hologram, and the coin is shipped unfunded. 20 were made and sold for 0.25 BTC each via the Bitcointalk.org forum. The slab it comes with has a QR code pertaining to the public key, allowing for easy funding by the buyer.
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