Russia
Catherine II copper Denga 1786-КM AU55 Brown NGC, Suzun mint, KM-C56.4, Bit-824. Well struck with iridescent surfaces and an uneven flan.
https://coins.ha.com/itm/russia/russia-catherine-ii-copper-denga-1786-and-1050-m-au55-brown-ngc-/a/61307-98097.s?type=DA-DMC-CoinArchives-WorldCoins-61307-01302023
HID02906262019
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Estimate: 50-75 USD