Hi Ken. Wow, what a stunning set! I am absolutely no expert on these types of wares but it seems the Water Lily pattern was introduced by Mason's about 1815-1820 and the shapes of the teawares would also suggest a similar date. Apparently Mason porcelains of this period (I'm assuming these are porcelain) were usually unmarked. Hopefully we can get someone more knowledgeable than I am to weigh in on this.