Watch List notes:

MEXICO. Mint Error -- Off Metal Strike, Struck on Aluminum-Bronze and Steel Planchet -- 10 Peso, 2021-Mo. Mexico City Mint. PCGS MS-67.

KM-616. This interesting piece reverses the normal strike composition, with an outer ring of steel and an inner core of aluminum-bronze, completely reversed from those types intentionally struck for circulation as opposed to those produced in error.

Estimate: $150 - $300