Fine China Tea Sets Question On Antique Tea Set?

Question on antique tea set? - fine china tea sets

I am pleased to see if someone knows where I make the tea, which I can find. I am delighted to see whether something is worth. The lower part of the series, "said Royal Windsor Fine Bone China, England and D2125 has a number written on the floor. I teapots and cups, plates, teapot, sugar and cream.