| Error Type | Issue | Fr. No |
Series |
Den | Serial Number |
Description |
Grade |
Price |
| Extra dark back-to-face offset printing | Federal Reserve Note | 2077 F | 1990 | $20 | F 25480262 A | This is the darkest, most complete reverse to face offset error I have seen, without a doubt a first generation printing and on a Twenty Dollar issue, to boot which just increases the scarcity of such an error; PMG has graded it 66 EPQ which also elevates it's attractiveness | S Gem CU | $1250 |