I changed over from plastic to pyrex for microwaving after the scare with using plastic for nuking. Mine are all the clear ones so not the old ones as you're talking about. But I do have my mother's square red exterior/white interior large bowl which might be one of the older pyrex. Remember we had smaller matching bowls to go with it too but those didn't survive. I still use my mother's Hamilton Beach 1948 Model G mixer on a stand. Picked up 2 extra sets of beaters too. It still works like a charm and though I'd love to have one of thosse new fancy mixer with special attachments, I'll continue using this one until it dies. Plus found another one just like it with the bowls and beaters at our local thrift store for $5. Can't beat that price and it works just as well so doubt I'll ever get the newer mixers in this lifetime.