Old Records

As I mentioned several weeks ago, I had my turntable fixed and have been listening to old LPs.  One of the side attractions of digging out the old records was finding what I had hidden in the album covers.  Sometimes there just isn't a proper place for something that needed protection, so the album jackets have worked well.  So far, I have discovered an old concert program from 1972, several pictures, and now these 3 home produced 78 records made in the 50s.

I don't have a 78 rpm record player, but more importantly, these records are warped.  Does anyone know how to "unwarp" an old home produced record.  If so, I would love to hear from you.

I may be singing THIS on one of these records.