- irregular background shading
- frame errors
- note 2 and Sn
The Koban Study Group 小判
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In Japan, Kotaro Wada was only supplier of copper-plate facsimiles... Maeda Kihei produced all litho-koban - including spiro group. origi... -
THE SPIRO FORGERIES OF JAPANESE STAMPS By Harold E. M. Bradshaw and Varro E. Tyler, Jr. Philatelic forgery, the production of counterfeit po...
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