I have almost learned Arabic numbers by using google image search, I am not exactly new to coin collecting I did it as a kid in the late 70's last month it got kick started again when I went to a thrift store before going to the VA for an eye appointment and the had a box with coins for 50 cents each so I took most of the older British large cents dating back to 1879, they also had a shiny silver coin for 5 dollars that was an Iowa centennial coin that I thought was plated, when I took it out of the holder to look at it I noticed an inch of the reeded edge was smooth and it said "060 .999 F.S.". I will put the Guatemalan coin away and let my kids find it when they get all my stuff when I'm gone. I wasn't expecting much more that a 3$ premium for it being an error