Trioctal? Schtbrot? X4 Bisaurfast? by Gustav Dorr & Co.,...
Trioctal? Schtbrot? X4 Bisaurfast? by Gustav Dorr & Co., Fra
Trioctal? Schtbrot? X4 Bisaurfast? by Gustav Dorr & Co., Frankfurt a. M. in Germany. One of a collection of colour dyes in bottles from the Colour Museum in Bradford, West Yorkshire, c.1900.