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SCHREIBER’S METAL MONAURAL STETHOSCOPE CONVERTIBLE TO PHONENDOSCOPE CIRCA 1880S TO 1900 – Antique Medical Instruments
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Schreiber’s Stetheskop made of metal, circa 1900. It could be set up as a monaural or by sliding the chestpiece down the stem to expose the shaft, a phonendoscope chestpiece could be attached to the stem.