Gibraltar – Banknote and First Day Cover – Bank Building – £1 – 1975 – Pick 20a – CU – This Crisp Uncirculated banknote was part of a series of world banknotes that was packaged by the Franklin Mint in the early 1980s. The cover has been postmarked on the day of issue in the country that issued the banknote. A really neat combinatioon of philatellic ad numismatic history.