Bought this one recently and was so excited about the quality of the work....i nearly we... myself.
The first pic shows the front of the plate and the second piece shows the reverse.
There is a signature ....that looks like....svorc..with an inverted v over the s. The signature is inscribed on the front along the edge.I would hazard a guess at mid to late 1950 and seen similar plates attributed to Bor glass works but ofcourse that does not mean that this is so.
Any ideas please would be great
many thaks
norman