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DALLAS Everyone knows that a Dallas Cowboys helmet is silver in color, but this one in town just in time for Super Bowl XLV is really silver.

The life-size NFL football helmet is one of just 22 dipped in pure silver and signed by Cowboys great Emmitt Smith after breaking Walter Payton's rushing record.

The helmet is valued at $10,000 and has a built-in microchip to track its current location.

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