I recently bought this table for my kitchen, and discovered the tabletop was attached to the metal base only with double sided tape.
It's REALLY heavy and if someone would lean on it hard enough to tip the thing, it just might break some toes.
There are holes (warped) in the underside of the table that correspond to holes in the metal base, so clearly it was attached at one point without cracking or damaging the top...
I'd have to make new holes to secure it properly and hope some ATers may have suggestions on what type of screw, dowel, etc. would be best for the task.
The underside of the tabletop says it was made by Dimentional Plastics Corp. (though the seller described the material as fiberglass) and it's dated 1962.