France
Republic white-metal Specimen Essai 10 Centimes 1881-A SP66 PCGS, Maz-2256. Remarkable electric iridescent colors of light blue, blue, purple, magenta, tangerine, and champagne adorn the mirrored surfaces. Resulting in masterful eye-appeal that's hard to look away from while viewing this coin.
Estimate: 300-500 USD