In 1921 American import law changed to require the place of origin be marked on a product in English. Since Nippon was an adaptation of a description of the island country in the native language, Nippon was no longer acceptable under the new law. Backstamps after 1921 state "Japan" or "Made in Japan."
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 U.S. Patent Act of 1952Â
I need to ask why you think it's 1912-1913? the reason I'm asking is, the Hobbie Lobbie girl was used in the 1960's  the name Japan inside a box is also common to the 1960s.. most sell for around $20.00
Re: antique box
 In 1921 American import law changed to require the place of origin be marked on a product in English. Since Nippon was an adaptation of a description of the island country in the native language, Nippon was no longer acceptable under the new law. Backstamps after 1921 state "Japan" or "Made in Japan."
Â
 U.S. Patent Act of 1952Â
I need to ask why you think it's 1912-1913? the reason I'm asking is, the Hobbie Lobbie girl was used in the 1960's  the name Japan inside a box is also common to the 1960s.. most sell for around $20.00
"Note" I do not claim to be an expert:Â Â