a few words about the UniJoin cards - on the front side the following is printed: serial (bottom left), BTC address (bottom center), qr-code of the respective BTC address and the block time of the production (bottom right). additionally the serial is embossed a second time above the UniJoin slogan.
and on the backside you can find the hologram (thanks to polymerbit) which protects the private key in the form of a qr-code printed on the card (which is additionally secured with a piece of paper). in addition, both sides have been professionally laminated and have a top quality