China
Warring States Period. State of Chi "Three Character" Knife Money ND (400-220 BC) Good XF, Hartill-4.6m, Jen-26. 178mm. 48.55gm. The obverse characters read: "Qi Fa Hua" (Qi Legal Money), and the reverse character reads "Che". An ideal type representative, the edges clean and free of chipping or corrosion, with light sandy deposits over hard apple green patina. The back displays a small inventory sticker from Mr. Opitz's collection.
From the Charles J. Opitz Collection
https://coins.ha.com/itm/china/china-warring-states-period-state-of-chi-three-character-knife-money-nd-400-220-bc-good-xf-/a/3084-30059.s?type=CoinArchives3084
HID02906262019
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Estimate: 1000-1500 USD