Here's a question for everyone; Why didn't the BEP recognize the Color as a minor revision??? Basically shouldn't the lower one be a Series 2006A?
Yes, that is strange. However, the change of prefix from "H" to "I" denotes the colour change. It's the only note to have a prefix change within the same series (check out this serial number site for a full list). In that list, you'll see that 2006 series are mostly "I" ($10, $20, $50), with "H" used for $100, and also for some $5. Series 2009 are all "J", and weirdly, 2006A are "K" ($100 only at this time). The prefixes are used thus: A 1996 ... $20 $50 $100 B 1999 ... $5 $10 $20 $100 C 2001 ... $5 $10 $20 $50 $100 D 2003 ... $5 $10 $100 E 2004 ... $20 $50 F 2003A ... $5 $100 G 2004A ... $10 $20 $50 H 2006 ... $5(*) $100 I 2006 ... $5(*) $10 $20 $50 J 2009 ... $10 $20 $50 $100 K 2006A ... $100
