Two Manchu words (read vertically) separated by the hole.
Reverse script
Mongolian / Manchu
Reverse lettering
ᠪᠣᠣ
ᡩᡠᠩ (Translation: Boo-dung)
Edge
Smooth.
Mint
Mintage
ND
(1810-1818) - Hartill#22.547: Open radical 貝 in 寶 - ND
(1810-1818) - Hartill#22.548: Open radical 貝 in 寶; Long lines of -ng- of Dung - ND
(1810-1818) - Hartill#22.549: Open radical 貝 in 寶; Dung written like Dui - ND
(1819-1820) - Hartill#22.550: Closed radical 貝 in 寶 -