The Austrian Post has released a line of crypto collectible stamps, according to a press release on June 11.

According to the press release, the so-dubbed “crypto stamp” is the first stamp in the world to be authenticated via blockchain technology. The postal service has reportedly issued 150,000 copies sold at € 6.90 apiece.

When purchased, the stamp set comes in two parts. As pictured below, the left part, which is stylized with a unicorn associated with Ethereum, functions as a standard stamp that can be used to send mail. The right section, on the other hand, contains the credentials used to authenticate the crypto collectible via blockchain.

Image of stamp set. Source: APA-OTS

As previously reported by Cointelegraph, a crypto collectible (virtual) racing car recently sold for $110,600. The “1-1-1” car, the first and only to be issued, was auctioned off in advance for the release of blockchain racing game F1 Delta Time.

As per the official description for F1 Delta Time, the title is a competitive racing game where different cars have various in-game attributes: