Well, with longer term use of the Euro banknotes, and with collector interest in serial # prefix letters and signatures. I have decided to make a check for the 16th edition of the Standard Catalog of World Paper Money.
The 1-7 notes will be for the signature of Willem F. Duisenberg, and 8-14 will be for the second signature of Jean-Claude Trichet.
Thus the varieties now in effect will be okay, and the Trichet signature notes will get the new numbers.
Also, since Slovakia (E), Malta, (F), Cyprus (G) and Slovenia (H) have started to issued Euro Banknotes, these new variety letters will start appearing in the 8-14 catalog number range.