This and the Atari 5200 version are the ones that started it all. These are the original versions that all the others are a port of.
There were a few cart/label variations — a picture label (with blue or black case) and a silver/blue text label with blue case. The silver labels tend to wear badly from handling, so it’s difficult to find one in good condition. Thanks to Paul (07pwb) for supplying a picture of a light blue label reproduction. It’s not surprising to see a repro label like this considering the tendency of the original to fade badly.