BTW, The M in the wreath mark was used from around 1914 to 1940. Noritake stopped importing to the United States in 1940. The M stands for Morimura. (The Morimura brothers were early importers of Japanese goods to America.) After the war, several years went by before Noritake started to supply dinnerware to the US again.
Source: Another onliner
Don.......