Brilliant-Wool-Blue B extra by Farbenfabriken vorm Fr....
Brilliant-Wool-Blue B extra by Farbenfabriken vorm Fr. Bayer
Brilliant-Wool-Blue B extra by Farbenfabriken vorm Fr. Bayer & Co. Elberfeld, Manufactured in Germany. One of a collection of colour dyes in bottles from the Colour Museum in Bradford, West Yorkshire, c.1900.