Stethoscope: Duophon/Planoscop, with innovative di
- late 20th century in Germany
Stethoscope: Duophon/Planoscop, with innovative diapragm chestpiece, made by Speidel & Keller, A Welch Allen Company, Germany. (Number 130 in R.Wilkie's catalogue).
- Clinical Diagnosis
- Object Number:
- Wilkie, Robert
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