The SCWPM lists three date varieties for the 5-rufiyaa from Maldives (Pick 18): 1998, 2000, and 2006. As it turns out, there are actually two varieties dated 2000. The difference is that the first variety has the printer imprint of DE LA RUE at bottom center on back, as does the 1998 note, whereas the second variety is without the imprint, as is the 2006 note. The transition from with to without imprint takes place between serial number prefixes E and F.
Courtesy of Bill Stubkjaer.