MEXICO. Mint Error -- Off Metal Strike, Brass Core -- 20 Pesos, 2019-Mo. Mexico City Mint. PCGS MS-65.
KM-Unlisted. This specimen distinguishes itself on account of being tri-tiered as opposed to the normal two-tier strike seen on this type. An aluminum-bronze outer ring encircles a stainless middle ring, surrounding a further aluminum-brass center. This cataloger suggests this was produced by carefully placing a One Peso planchet within the outer ring originally destined for this type, creating the three distinct layers.
Estimate: $200 - $400