Collection of 18 black wax sounds and 2 pieces of black rubber tubing in metal case

Collection of 18 black wax sounds and 2 pieces of black rubber

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Collection of 18 black wax sounds and 2 pieces of black rubber
Science Museum Group
© The Board of Trustees of the Science Museum

Collection of 18 black wax sounds and 2 pieces of black rubber tubing in metal case, c. 1860

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