1800s Archive · Architecture & city

Phila. Mint drum machine for drying blank coins after they were heated and washed in an acidic bath

Philadelphia, Pennsylvania · 1876

Phila. Mint drum machine for drying blank coins after they were heated and washed in an acidic bath, Philadelphia, Pennsylvania, 1876
Phila. Mint drum machine for drying blank coins after they were heated and washed in an acidic bath, Philadelphia, Pennsylvania, 1876. Architecture & city — The 1800s Archive, from the Library of Congress record.

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