Part of the problem with ERF is that there have been NO other ERx prefixes. Complicating matters is that EPx was the 1986 $5 series, and ESx was the 1991 $20 series. - Pooga

There are ERB, ERC and ERD $20 notes that have been confirmed and entered on CMT. I am almost positive ERF is a valid prefix.

Perhaps JaketheDrifter could send in a scan of one of her notes and we could use that as final confirmation.

[ message was edited on: 2009/04/17 ]