Cambodia
Norodom I brass Specimen Essai Test Coin 5 Francs 1875 SP63 PCGS, Brussels mint, KM-XT4, Lec-96 var. (there, in copper). Reportedly of the highest rarity, displaying electric violet tone over brassy yellow surfaces. Struck by the Menning Brothers as a sample for their minting press's capabilities in an effort to sell minting equipment to Cambodia.
https://coins.ha.com/itm/cambodia/cambodia-norodom-i-brass-specimen-essai-test-coin-5-francs-1875-sp63-pcgs-/a/3084-30057.s?type=CoinArchives3084
HID02906262019
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Estimate: 5000-6000 USD