I was checking the 10 centavos that I picked up on a trip to Argentina in late 2006. I have all three 2004, 2005 and 2006. The year date on 2004 is much smaller than the other two. The 2005 & 2006 appear large as in the image for the 1992 coin. Are all 2004 coins with a smaller date, or are there large & small date varieties? The difference in size is very obvious. Other characteristics seem the same (reeded, non-magnetic)