I've seen a trinket set tray on sale on eBay with a label which is said to read:
CRYSTALOR
MADE IN ENGLAND
Has anyone come across Crystalor before please?
Timescale would be 1930s-1950s at a rough guess.
eBay item (listing ended) is no. 180607026871
I have the same tray in pink and clear without the label (pic attached)