- Isenthal, Potzler and Co. "Electro Medical Instrumemts, number 54", September 1898.
- Photocopy of Isenthal & Co. "Radiographic List", 1900
- Isenthal & Co. "Apparatus for Radiography, High Frequency, High Potential Treatment, Electro Therapy, etc.", Christmas, 1902.
General X-ray and Electro-Medical Apparatus
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- ReferenceGB 133 GUT/1/2/1
- Dates of Creation1898-1902
- Physical Description3 items Condition: Both items fragile.