1999 Presented material is an attempt to make the most full list of the cash coins of Vietnam and China, which have the same legends.
List includes only copper cash coins.
Most of such coincidences have place for private coin issues and only few of such coins were issued officially by Vietname rulers. Please check Timeline and imperial coinage of Vietnam for details. Note that at the beginning of the 17 th century, coin trade between the Viet and Japan happened already and then followed by the Dutch East India, the Chinese with the Viets. Coins traded before 1659 such as Vinh Lac , Khoan Vinh were not minted in Nagasaki by the Shogunate's decree in 1659. Details about Nagasaki trade coins may be found in the article ' Japan early trade coin and the commercial trade between Vietnam and Japan in the 17 th century ' by Thuan Luc.