Four Chinese ideograms read top to bottom, right to left.
Obverse script
Chinese (traditional, regular
script)
Obverse lettering
永
通 寶
曆 (Translation: Yong Li Tong Bao Yongli (Emperor) / Universal currency)
Reverse description
One Chinese ideogram at various locations
Reverse script
Chinese (traditional, regular
script)
Reverse lettering
工 (Translation: Gong [For Ministry of Works])
Edge
Smooth.
Mint
Mintage
ND
(1646-1659) - Hartill#21.48: Gong above; Tong with closed head and one dot - ND
(1646-1659) - Hartill#21.49: Gong to the right; Tong with closed head and one dot - ND
(1646-1659) - Hartill#21.51: Gong below; Tong with closed head and two dots - ND
(1646-1659) - Hartill#21.56: Gong above; Tong with open head -