RARE 1983 ROYAL ARMS ONE POUND COIN ERROR "DECUS ET TUTAMEN" UPSIDE DOWN! The item "RARE 1983 ROYAL ARMS ONE POUND COIN ERROR DECUS ET TUTAMEN UPSIDE DOWN" is in sale since Wednesday, January 13, 2021. This item is in the category "Coins\Coins\Europe\UK". The seller is "coincollectandtrade" and is located in Melbourne. This item can be shipped worldwide.