Cancelled envelope mailed from Mineral Park, Arizona, April 11, 1882. The rich abundance of metals in the area gave Mineral Park its name in 1870. Mineral Park was the county seat for a short time in 1873, but when mining production slowed down in 1882, Mineral Park became inactive and is now abandoned. The mining camp established its post office on December 23, 1872 with Alder Randall as the first postmaster.
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