George,

In regards to your first point about the date of plates marked "MADE IN JAPAN", Nilsson clearly states that "Pieces marked with JAPAN or MADE IN JAPAN in plain text without any company marks, in general date to the period immediately after the second WW."  Here is the full text to be found here: http://www.gotheborg.com/marks/20thcenturyjapan.shtml

"Marks on export porcelain: In 1891 the McKinley Tariff Act was instated, requiring items imported into the United States to be marked in English with the country of origin. The name "Nippon" was chosen for items coming from Japan. (Nippon is the Japanese name for Japan.) In 1921, the official country of origin name requirement was changed to "Japan", thus creating a defined time period 1891-1921 in which wares were marked Nippon. Previous to 1891, items were either not marked at all, or marked with Japanese characters. During the period 1921-1941 porcelain should be marked "Japan" and roughly after 1941, marked "Made in Japan", though numerous exceptions appears to occurs.

Pieces marked with JAPAN or MADE IN JAPAN in plain text without any company marks, in general date to the period immediately after the second WW. Some come with the addition of OCCUPIED JAPAN."

Let me know if you differ with Nilsson or if I am misunderstanding your issue.

Thanks,

Mike

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