If I started collecting these I would have to go back to 1973 series 1 and 2 and look for those Ludlow position variations as well, and I ain't doing that!
Nah, there are just two lud variations for each title in Old School 3 and 4. It was fun in Old School 3, you could pull two different lud backs of a title fairly easily. That's when forum members like Monsterettes did the work of creating a list distinguishing the back variations based upon camels. Thus ensued some fun and challenging trading based upon camel counts for that last sticker or two you needed for your variation set. As I recall, mine was a Six Dollar Man sticker.
Unfortunately, this time we're seeing people with more than 10 boxes not getting a single lud variation. So, who is going to be able to create a list this time?