Unknown Japanese coin of the XVIIth Century

Obverse Reverse Inscription

In the KMXVII Catalog I found the key to dating 'ichi bu' and 'ni bu kin' (sort of old Japanese coins), that is placed at the right part of shown item's obverse.

Character for the Shotoku and Kyoho periods are not era marks but are varietes of writing mint mark names.

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