British Felsol Company, Ltd. "Wigton House," 206/212, St. John Street, Clerkenwell, London, EC1.
- Date:
- [1948?]
Licence: In copyright
Credit: British Felsol Company, Ltd. "Wigton House," 206/212, St. John Street, Clerkenwell, London, EC1. Source: Wellcome Collection.
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