From what I have seen the Black and White version were the first print run and the address was not included, the 5 I had years ago not one had the address. The address was added and the color charged shortly after release so the B/W are very scarce (have not seen them bring much of a premium thou). The final change to the series was when the company was sold to Exhibit Supply they then blacked out the old address on the back and added the new address.
So three different backs on this series with two different colors. Here are the different fronts
Here are the 3 backs, my b/w has some paper attached but you can see there is no print under it-
