Thailand
Rama V copper Proof Pattern 4 Baht (Tamlung) ND (1868) PR60 Red and Brown NGC, Uncertain English mint, KM-Pn32, Krisadaolarn/Mihailovs-pg. 164, Plate F32 var. (there, in nickel). The largest denomination within this off-metal pattern set, boldly struck throughout with just a minor scattering of handling in the fields precluding a finer designation. Very seldom encountered in any condition, we note that a PR58 example sold for $9,000 in August 2018.
From the Dr. Norman Jacobs Collection of Thai Coins
https://coins.ha.com/itm/thailand/thailand-rama-v-copper-proof-pattern-4-baht-tamlung-nd-1868-pr60-red-and-brown-ngc-/a/3084-30347.s?type=CoinArchives3084
HID02906262019
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Estimate: 6000-8000 USD