'Collosol' tannic acid spray, boxed, with ampoule, by Crookes Laboratories Limited, Park Royal, London, NW10, England, 1931-1940. 'Collosol' tannic acid spray 1931-1940
'Collosol' tannic acid spray, boxed, with ampoule, by Crookes Laboratories Limited, Park Royal, London, NW10, England, 1931-1940. 'Collosol' tannic acid spray 1931-1940