Stack's Bowers & Ponterio
Collector's Choice October 2021 Auction 12-14 Oct 2021
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MEXICO. Mint Error -- Struck on Aluminum-Bronze Planchet --10 Centavos, 2009-Mo. Mexico City Mint. PCGS MS-63.
KM-934. Small type. It is unknown how and why this small aluminum-bronze planchet originated and later ended up inside the striking chamber meant for stainless steel 10 Centavos pieces. Bright Choice Uncirculated with some charcoal patina visible on the eagle's side. The mystery of its production will only make it more desirable for specialists to ponder.
Estimate: $150 - $300
KM-934. Small type. It is unknown how and why this small aluminum-bronze planchet originated and later ended up inside the striking chamber meant for stainless steel 10 Centavos pieces. Bright Choice Uncirculated with some charcoal patina visible on the eagle's side. The mystery of its production will only make it more desirable for specialists to ponder.
Estimate: $150 - $300