Some nice cards

Any way to verify authenticity?

Metal plates and engraving....  seems like anyone could do this

Seemingly there are ever increasing companies that are copying the "engrave your plate" / CryptoSteel model:
https://cryptokeystack.com/
http://bulletproofbitcoin.com/
https://bitkee.com/
https://www.toughgadget.com/bitcoin-crypto-metal-recovery-seed-wallets/