Thanks for the replies.
I noticed after I took the pictures that it appears as if there is some electrical tape on the pocket I took a picture of. I can assure you there is no electrical tape.
I think you are probably correct though, the table was so old we we got it that I think someone from the original pool hall must have put these liners in as the pockets worn away.
Guess its time to get creative or look at buying all new leather pockets.