4 Stethoscopes. A- perhaps Duckworth's, B- Duckworth's, signed Maw. C- Fergusson or Stoke's type. D- obtained from France.

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: 4 Stethoscopes. A- perhaps Duckworth's, B- Duckworth's, signed Maw. C- Fergusson or Stoke's type. D- obtained from France. Wellcome Collection. Source: Wellcome Collection.