Yeah, companies would just reuse packaging and labels. (Remember when Disney would put Beta-sized labels on their VHS tapes?)
I once found a copy of My Fair Lady with the pre-1982 MGM/CBS packaging and labels (coincidentally, at the same library where I found the 1982 VHS of Star Wars), but when I played it, I got the second CBS/FOX logo.
I also have a mid-80s CBS/FOX copy of The Muppet Movie that came in a Magnetic Video box.
I also remember renting two copies of Sixteen Candles on two separate occasions which were almost indistinguishable, except one had the altered soundtrack and one had the original.
Anyway, how did you find out about that price code?