I think Rmorse is right, the new devices have been introduced a couple of years ago.
I'm surprised Ktm you still can use the platinum device (it sounds like the former device I had) , I thought IB had forced all customers to update their device, the new one is much thinner, similar to a credit card in dimensions.
There was a thread here when the change was implemented, some poster arguing that the former device offered more combinations, and several that the new one is fragile, the screen getting spoiled easily.
I didn't like the switch very much but got used to it and haven't had a problem since I received the cc like device.
As of the card with the codes on it, I've actually used it for a secondary account, it might look more convenient but it's far less safe and is only OK for smaller account sizes as there are limits on withdrawal amounts.