May 30, 2000
Obverse: Kang Xi Tong Bao|
Reverse: left - Manchu ..., right - Chinese Che (Chekiang mint)
Additional marks (small dots) are placed in the different locations of the coin reverse. On the scaled image below can be seen that those dots seems are not the casting defect but special marks.
Werner Burger, Ch'ing Cash until 1735, page 78:
VB: I have more similar Kang Xi coins with extra small reverse marks
casted by the Board of Revenue mint (14 coins) , Shandong mint (1 coin) and ... mint (1 coin).
Any additional information highly appreciated.
Chinese Coinage Web Site