Trying to figure out the signature codes on the base of this vase, as they don't seem to gel with the listed codes in Ivo's book.
It has the usual full Strömbergshyttan signature (not photographed), then there's a symbol... maybe an ampersand or an '8' or a stylised 'S', followed by what looks like 924. After this there's the code C 1515.
Any clues? Are these specific to engraved glass from the factory?