Two Manchu words (read vertically) separated by the hole.
Reverse script
Mongolian / Manchu
Reverse lettering
ᠪᠣᠣ
ᡠ (Translation: Boo-u)
Edge
Smooth.
Mint
Mintage
ND
(1854-1856) - Hartill#22.855: Tong with open head: U with head connected - ND
(1854-1858) - Hartill#22.852: Tong with open head; U with head disconnected - ND (1857) - Hartill#22.854: Tong with closed head -