Hi, thanks for everybody's input, most appreciated.
I was going through my Lesley Pina books and I noticed a close similarity to the Boda signatures, which seems to be a letter, 3 numbers, forward slash then 3 numbers (taken from Erik Hogland examples) with no company name. I also noticed that Monica Backstrom was working at Boda from 1965 could this be one of her pieces? or any of the others from Boda? Tia Wolfie