Posted By:
Hal LewisThe blanked back E107's and the regular E107's are about 50/50 in my experience, but others may differ slightly.
It is the one with the purple "Breisch Williams" stamp on the back that are very rare.
But then again...
as we have discussed on this board before...
how hard would it be to create such a stamp and "add" that feature to your cards?? I really don't know.