The peach Stamp on the bottom shows a crown within a wisteria wreath and the words CHIKARAMACHI in a semi-circle above and MADE IN JAPAN in a straight line below.
'Why Not Antiques', has a little history on the pieces and apparently starting in 1928, 3 stamp versions where made in varying colors; the second stamp set was apparently in the colors of Red & Peach. This seems to have been a test line of Porcelain by the Noritake Company, as I read since it was of cruder make and hand painted design; possibly to test if it would go into a main parent line for sale.
I cannot and probably will never be able to correctly date the 3 Tea Cups with Saucers that I acquired, since all production for the Noritake Company ceased in 1942 most likely due to the U.S.'s incendiary bombing of Noritake's main offices.
Which in light of that is a very sad thing for those of us interested in preserving history.
Either way, I now own a wonderful piece of Japanese history and I hope that I can preserve much more in the coming future.
Here are photos of the items:
R. William Holzkopf Jr
Why Not Antiques: http://members.ebay.com/ws/eBayISAPI.dll?ViewUserPage&userid=wnantqs
Noritake Co. http://www.noritake-elec.com/about.htm