Slide collection related to EXPO'70. - Title: Discovery of Progress and Harmony EXPO'70 - Price: ¥8,400 - Format: Slides A major event of the 1970s, symbolizing Japan's rapid economic growth, the Japan World Exposition. The excitement that enveloped all of Japan was incomparable to the second Osaka Expo currently being held. "Mainichi Color Slides: Discovery of Progress and Harmony at the Japan World Exposition EXPO'70" published by Mainichi Newspapers. A file containing 84 color slides, with an explanatory booklet in both Japanese and English. The box is damaged, but the contents are in good condition. It's been 55 years, so it's uncertain whether they can be played clearly with a projector. It is undoubtedly a very rare item.