Sealand claims or legitimacy and sovereignty are based court ruling in 1968 declared Roughs Tower (an abandoned sea fort, AKA Sealand) to be in international waters (UK territorial waters would eventually be expanded to include this area).
Micro-nations (lands claiming independence, without formal recognition from ‘major’ countries and international bodies) are of particular interest to me.
Many micro-nations issue coins, stamps, passports, etc. as ways to generate revenue and draw attention to local issues and concerns that may be overlooked by the ‘formal’ government of a given area.
Personally, I think it’s a brilliant way to generate interest/awareness whilst furthering causes.
My Sealand Passport
The Sealand Stamp