the queen's silver jubilee souvenir sheet postal validity

These are souvenirs sheets, these were printed by the Post Office, sponsored by a British Stamp Dealer Rushstamps. They bore embossed stamps and so were postally valid, they could be used as postcards. Three different designs were used and two values, 6½p for second class mail and 8½p for 1st class. The 8½p has two phosphor lines. There were a limited number of sheets printed and each one issued bore a serial number printed in black on the back.

There was also an aerogramme, these images show the front and back of the item.