What years was the word nippon used on porcelain?

There was a segment on the Antiques Roadshow about porcelain. I think they said it was pre-1930's, but I'm not positive. Their website re-airs all the appraisals. You can search porcelain/Nippon and see what pops up:

http://www.pbs.org/cgi-registry/wgbh/roadshow/archive_search.cgi?q=porcelain+nippon&city=&season=&episode=&category=&appraiser=&value_min=&value_max=&x=0&y=0

First answer by RR12345. Last edit by RR12345. Contributor trust: 92 [recommend contributor]. Question popularity: 4 [recommend question]

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