I have a number of resources to check varieties on cent errors, but I just picked up a new collection from someone who had about 40 Jeffersons in flips, some proofs some not, and there are some very strikeing double and triple die errors along with a handful of rpm's. I haven't been able to find a good online resource to check these against known examples. Something along the lines of coppercoins.com for cents would be ideal. Any ideas?
