MEXICO. Mint Error -- Off Metal Strike, Struck on Aluminum-Bronze Planchet -- 10 Centavos, 2018-Mo. Mexico City Mint. PCGS MS-65.
KM-934. This cute off-metal strike is rather compelling in that the original strike metal was intended to be stainless steel, yet this example presents in all the brassy hue of aluminum bronze.
Estimate: $150 - $300