1830 Guernsey Double ?

OK I didn,t know that thanks

The Guernsey double derived it's name from the mediaeval French coin, the "double tournois". Given their proximity to France, French coins circulated on the Channel Islands much more than English coins did.

While Guernsey is a crown dependency of Britain, it's usually considered a separate country for coin collecting purposes.

The relationship between Guernsey and Britain is similar in some ways to the relationship between Puerto Rico and the United States. Puerto Rico is an American territory, yet if you talk to a local, they are Puerto Ricans first, Americans a distant second. Likewise, the people of Guernsey don't usually consider themselves "British". Quite the opposite, in fact. Since the islands were originally part of the mediaeval Duchy of Normandy, and it was the Duke of Normandy that sailed off and conquered England in 1066 (from whom the current Queen is descended), the Channel Islanders consider England to be their colony, rather than the other way around.

British coinage is legal tender in Guernsey and the two coinages circulate side by side on the island, but Guernsey coins aren't legal tender in Britain (though they're sometimes found in change there).

now I am a lot smarter I did not know that thanks