Lovibond Comparator Colorimeter, by The Tintometer Ltd, English

Black cardboard box with flap lid. This contains: one red glass bottle with red rubber stopper with paper sticker with descriptive information 'Bromo-Cresol Purple' 'pH 5.2 - 6.8'. Contains >20ml liquid, presumed to be Bromo-Cresol Purple pH indicator.  Plastic case with 'The Lovibond Comparator' inscribed and inside this case - a comparator wheel with 9 coloured sections ranging from yellow to purple, 2 glass blocks.