
I thought the initials in the middle were SCG which should be S.... C...... Glass (Glas? might it be German? but the numbers don't look European)
then the NO is the number of the piece.
Then the date
then PJ and BSH being the maker and cutter of the piece.
However once I'd decided all that last night, I then thought it might all be wrong and perhaps PJ and BSH were twins and the date was their birth date - maybe a 21st birthday present as it looked as though it could be a more recent piece than 1983.
I was surprised by the date as I would have thought either later or much earlier had I not seen the base at all. Just goes to show, don't judge a book by it's cover
It might help to look up Glass engravers in the UK via the Glass Engravers Guild and see if the initials fit.
But also Australian/New Zealand makers.
m