Quality types
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Brilliant uncirculated Coin quality in which the coin's field must be clean, with the proper brightness of a normal minting and without marks. A bullion quality example is the "Centenario", fineness .900 in pure gold.
Proof Quality of a coin in which its field must be clean, with brightness similar to a mirror, without spots and with the reliefs correctly delineated. The proof quality is exemplified with the commemorative coin "Lobo Mexicano" (Mexican Wolf ) elaborated in silver fineness 0.999.
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