It made me think of these. Perhaps not surprisingly I've managed to keep almost every flight ticket I've ever had (or rather what bits you were allowed to keep) and thanks to having, a few years ago, clients around Europe with whom we had monthly meetings, have quite a pile stashed away. Now I mourn their demise. Yes, the e-ticket is very convenient but I did love the old rounded cornered, complex background patterned, dot matrix overprinted cards.
My favourite bit was that 12mm wide strip that carried the staple.
As We Made This suggest, I imagine a similar fate awaits the Tube ticket.