I had one of these with Halifax when I was a teenager with their Visa Electron card. Non-embossed with an etched printed card number with the words ‘ELECTRONIC USE ONLY’.
The problem I had with the etched printed cards instead of the embossed ones was that the numbers would rub off/fade over time and become nearly illegible. I still have the account (although I don’t use it) and the numbers still rub/fade off. You can tilt it to the light to see the extremely subtle etching when they printed it but embossed is so much easier and clearer to read when it fades.