I believe it was to celebrate George the Sixth's coronation. Those goblets are wonderful for champagne - only takes 4 of the to empty a bottle but they sit in the hand superbly. There is another range also called Coronation that has Black glass highlights and a slightly different engraving. I have only ever seen tumblers of that style. I have 8 goblets, 8 white wines and 8 tumblers - I use them all the time.
Ross