Here are two items that I recently purchased. Not sure where to pay them do I choose Paper Money as in a sense, that’s what they were in 1988. They are from Australia’s Bicentenary, 1788-1988, World Expo 88. Only good inside the World Expo 88 grounds between April 30 and October 30, 1988 as stated on the front of the note, centered at the bottom. One had a value of $2.00 and the other has a value of $5.00. They are extremely crisp with no bends, no tears or signs of handling. Both notes do have a few color spots on both sides. Printed by the American Banknote Company.
Nut, Let me qualify that I am no expert on paper currency, but do want to offer a different perspective. It looks like the design is based on Art Deco principles. Art Deco-related art can be highly valuable that's greatly dependent on the artist. Some Art Deco posters are highly collectible due to the artist who produced original work. Something to consider since that particular note seems to be a converge of paper currency and Art Deco. CoinMagic
They're considered souvenir notes or exonumia by most collectors. The "colour spots" look to me like planchettes which were a security feature used by the ABNC (& other printers). The design principles are similar to the "Commonwealth of Australia" decimal series launched in the 1960's but a bit more art nouveaux I guess. Check out this WBM link to Australia's first polymer 1988 Bicentennial $10. Here's a NUMISTA link for the $5.00 Expo Dollar Here's the NUMISTA link for the $2.00 Expo Dollar. Nice set!