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Alcatraz Penitentiary - SOLD 3.93" Showcase Concrete

Alcatraz Penitentiary - SOLD 3.93" Showcase Concrete

This is an authentic piece of concrete from Alcatraz Penitentiary. Yes, an actual piece of “The Rock!"

This particular specimen is a 3.93" piece.

This specimen, from the famous Alcatraz island, saw some 1,500 prisoners pass by it during the prison's operation. A certificate of authenticity is included.

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