That’s interesting, I hadn’t noticed the different base on the flint one. I have come across quite a few of these little beasts, but never seen one with that base before. Do you know how many different colours/variations there are, mine is blue rather than turquoise so that's another colour I'll be on the look out for.
I take it that you have a winged sphinx...yet to find one of those...at the right price that is!