It took me a while but the difference is litterally in the font size of the card number on the back. The "regular" edition number in the circle is a larger font and takes up a lot of the circle (looks about 4 or 5 font point sizes larger than the font around the circle), the "small card number" version the card number is barely larger than the font that makes the circle around the card number (looks to be only 2 or 3 font point sizes larger than the surrounding letters)
I collect: Baseball, Football, Hockey, Mostly Vintage pre1980, My Homie teams - Washington/Baltimore Teams Senators (Twins, Rangers), Expos/Nationals, Redskins, Capitals, Bullets/Wizards - HOFers - Non-sport (mostly TV shows and movies).
My Trade List is very much a work in progress
CaptKirk42s Trading Card Blog Curly W Cards Strive For '65 YouTube klandersen42