A blank planchet...hmm? Picture, please. Scan the image and crop it (in answer to your other post) pictures are available for most of the coins. But if you wanted to add your own pictures, you can send a modification request.
I have two blanks as well. Mine are both UK two pound coins - luckily identifiable as they had just the edge inscription on. Yours may be tricky as there is no way of knowing where they are from - or even if they were meant to be coins. There is a picture of mine at the end of this Topic ...
Hi Andrew! Nice to know another person from SA on Numista! Do you mean our 5 cent coin? The only problem I have with this theory is that I know it's been in a box for about 20 years... It may be that we'll never truely know! Cheers, Janine