For Sale: Old thickness Desert Sands chips

[JonPKibble]

I use these chips (as you could probably tell by my avatar) and I am just curious, when were the "old" chips purchased, and when were the "new" ones purchased?

Just trying to figure out when this change was made, as I have some more DS chips on the way that I ordered from a comp site (I'd list the name of the site but I'm afraid if I did that ten people would cry spam on me).