Two Manchu words (read vertically) separated by the hole, all with one Chinese ideogram above.
Reverse script
Chinese (traditional, regular script),
Mongolian / Manchu
Reverse lettering
四
ᠪᠣᠣ ᠶᡡᠨ (Translation: Si / Boo-yūn Four / Boo-yūn)
Edge
Smooth.
Mint
Yunnan Mint, Lin`an Branch,modern-day Jianshui County, Yunnan, China (1685-1861) Yunnan Mint, Ningtai Factory Branch, Yongping, modern-day Yongping County, Yunnan, China(1853-1861) Yunnan Mint, Old Dongchuan Branch, modern-day District de Dongchuan, Yunnan, China(1724-1908) Yunnan Mint, Qujing Branch,China (1777-1861) Yunnan Mint, Yunnan-fu Branch,modern-day Kunming, Yunnan, China (1659-1911)
Mintage
ND
(1854-1861) - Hartill#22.0990: With commercial-style Si (乂); large Si - ND
(1854-1861) - Hartill#22.0991: With Da (大) - ND
(1854-1861) - Hartill#22.0992: With Shang (上) - ND
(1854-1861) - Hartill#22.0993: With Si (四) - ND
(1854-1861) - Hartill#22.0994: With Wu (五) - ND
(1854-1861) - Hartill#22.0998: With Gong (工) - ND
(1854-1861) - Hartill#22.1008: With Yi (一) - ND
(1854-1861) - Hartill#22.1009: With San (三) - ND
(1854-1861) - Hartill#22.1010: With commercial-style Si (乂); small Si - ND
(1854-1861) - Hartill#22.1011: With commercial-style Wu (五) -