Congratulations, Alex133 and nice work, grannyjanny! This easily beats my 2005 chilli seeds, almost all of which I chitted successfully a few weeks ago, on kitchen paper moistened with boiled, cooled water, put in a plastic box, loosely covered, and left next to the boiler.
I also chitted half a packet of last year's parsnip seeds using the same method, but on the windowsill, and pricked out 40-odd seedlings, the other day. I think chitting is a great way to establish whether seed is still viable, because you don't risk wasting compost if the seeds are past it.
I think it's well worth hanging onto old seed of various types. Which ought to make me less likely to splash out on yet more packets, but doesn't! ;D