That's correct nlitworld, the side I showed says FAC 73 Blue Monday and
SlushPuppy, if it’s something you want I am sure you can find a copy they sold millions of them.
Here is the decoder
That's pretty cool. There were a couple of bands that did something like that in the early 2000's where if you decoded it properly you could get demos or songs that didn't make it to the album from a "secret" website. Neat stuff. Sadly, I lost interest in vinyl after my last military overseas move. Not one of my albums survived and they only gave me $1 a piece for them. Been digital ever since!