These are the six plates that I found together with the Alcock "Commerce" bowl from my previous post. They're an exact match with the entry in the database, which states "maker unknown." My question/comment is: apparently the bowl and plates were brought to the swap shop as a set, so perhaps a previous collector acquired them together. The similarities in these two patterns are remarkable, perhaps the plates were also made by Alcock? Any ideas for resources to identify this maker's mark?