I posted this on the coin talk forum, and it was pointed out to me that this is a more appropriate place to post. I have an interesting error I just found on a lot of Silver Certificates I just acquired It appears like a negative print of the front side on 1/3 of the backside If anyone has some knowledge of this type error, rarity, how it happens, etc, I would appreciate some feedback The following reply was posted, whcih I consider answered the question It's an offset printing error. Value varies depending on the grade of your note but I would say $75 to $100: http://www.coinsite.com/html/uscurrencyerrors.asp If a sheet fails to enter the printing press, the inked plates will transfer their image to the impression cylinder. The next 6 or 7 sheets will receive the impression from the cylinder while the other side of the note is being printed. The result is an offset printing in reverse on the already printed side.
I believe the answer you received is correct. You should have it authenticated by PCGS or NGC. Nice find!
