Nice Cake plate for sure. I did look through my books in hope of finding a clue to the pattern, but I mostly have books on Pressed Glass. It would appear you have a cut Crystal one. I have search a couple of times before looking for cut Crystal patterns on Cake plate. Can be very hard, since many of these was made just for weddings and not part of a Dinnerware set. I assume it has no markings, which would not be a surprise. These would be hard to date without knowing the pattern. I personnally think it would be Depression era at the most, but That would just be a guess, based on the images. I will look around at a couple of EAPG Books I have, but I'm sure they will come up dry too. Just want to mostly say welcome to the forum and thanks for posting such a wonderful item.