Translation: Dang
Boo gung
Chen
Note: The inscription appears to be a multilingual representation of a coin's denomination. "當" (Dāng) is Classical Chinese for "worth" or "equivalent to". "ᠪᠣᠣ ᡤᡠᠩ" is the Manchu transliteration "Boo gung" for "Bǎo Gōng" (寶宮), likely a mint or authority name. "千" (Qiān) means "thousand" (in cash). The full meaning is "Worth one thousand cash, from the Boo gung (mint/treasury)".