When did US Games stop using Pixie's letter on the standard Rider Tarot?

Essence of Winter

Both decks I have that I bought in the 1990s (around 1993 and 1998) have Pixie's lettering on all cards, as does the Miniature Rider that I bought around 2012. I note that new standard editions (i.e., not the Original or Centennial) have the different lettering. Does anyone know when that change was made?
 

Abrac

I first noticed it on one I bought in the late 90s or early 2000s. Can't remember for sure where it was printed. I took it back to Hastings and they let me return it. :)