Two Manchu words (read vertically) separated by the hole.
Reverse script
Mongolian / Manchu
Reverse lettering
ᠪᠣᠣ
ᠶᡠᠸᠠᠨ (Translation: Boo-yuwan)
Edge
Smooth.
Mint
Ministry of Public Works Mint,Auxilliary furnaces (工部局), Beijing, China (1726-1898) Ministry of Public Works Mint, New Branch (工部局), Beijing, China (1726-1898) Ministry of Public Works Mint, Old Branch (工部局), Beijing, China (1726-1898)