Pyr-O-Rey (aka Dynaware) was made by a Mexican company called Vitrocrisa (later known as Crisa), which was acquired by Libbey in 2006. It’s hard to find information on Pyr-O-Rey in general, and I’ve only ever seen it in this Brown Daisy pattern. Most collectors seem to regard it as a Pyrex/Fire King knockoff, judging from the name especially. Still, I think it’s charming and I couldn’t pass up this piece at Hope Thrift the other day. Hey, it’s the perfect dish for some Pickle & Cheese Party Spread!
There are a few snippets of information on Pyr-O-Rey over at Pyrex Love and The Pyrex Collector.