1864M 20 reales. The 20 reales of this type were issued from 1856 to 1864 at the Madrid, Seville, and Barcelona mints. AU examples are rarely seen and uncirculated examples are almost never seen. So rare are these coins in eye appealing, problem free condition that coins with nice eye appeal which exhibit mild cleaning or small scratches are often acceptable to collectors and trade at prices reflecting this.
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