Don't know about these limited editions as the number is 5,000 and they both are the same numbers so they were a set. I have posted the One .999 fine silver one I have, it has a different back then the others. I have 3 more along the Watergate line. There isn't any info that I could find about the company on line the word means merge and is used in the drug industry a lot. They are different subject matter than I have come across.