【Extremely Rare, Vintage Item】SONY Cassette Dictionary 5-Volume Set, Showa Retro Trivia

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This is a rare set of 5 Sony Cassette Dictionary volumes, manufactured in 1971.
These are unique items where **mini dictionaries (paper documents)** are stored inside cassette cases, not on cassette tapes themselves.
With Sony's playful design typical of the era, they create a wonderful atmosphere just by being displayed alongside cassette tapes.
■ Set Contents (5 items total)
• Terminology Edition / Character Usage Edition / Idioms & Proverbs Edition / Letter Examples Edition / Foreign Words Edition
• Each volume comes with its own sleeve case.
■ Product Condition
• Contents (Dictionary): No major damage such as tears found, but there may be age-related discoloration or spotting on the paper.
• Outer Box & Cases: As these are nearly 40-year-old items, the outer boxes have scuffs, peeling, and minor scratches. Please understand this as a vintage item.
These are rare items that are difficult to find nowadays.
Would be perfect for those who like Showa retro雑貨 (Showa retro goods), Sony fans, or collectors who fondly remember the audio culture of that time.
[Shipping Method]
Items will be carefully packaged with waterproofing and cushioning for shipping.