Greetings,
I believe Sealand should be Moved to the “Modern states with limited recognition” section of the coin catalogue. This is because they technically could be considered a country with limited recognition. They have many similarities to Somaliland. Also Sealand has de facto recognition of both Germany and UK. Finally, Sealand does meet the requirements to become a country by the 1933 Montevideo Convention. I am just saying this may be something to consider.
Cheers,
Berkshire Collecting