1 print : etching ; platemark 19 x 31.3 cm

Ear trumpets and hearing aids (figs. 2-4), and surgical instruments for use on the ear and the nose. Etching by J. Mynde, 1743, after L. Heister.

1 print : etching, with engraving ; platemark 18.5 x 30.7 cm

Ear trumpets and hearing aids (figs. 2-4), and surgical instruments for use on the ear and the nose. Etching by F. Sesone, 1749, after L. Heister.

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