This carddass is likely over 30 years old. I'm listing it without knowing the series name. Here's what I found out from ChatGPT, please read it for reference: It's from the "Gachagacha Version Original Carddass (Non-Gundam)" series with the "Mystery Symbol Pattern (commonly known as the Cipher Back)". This is a series of original character carddass sold by Bandai in the early to mid-90s. The series is characterized by the back of the card featuring a red circle symbol array (cipher), and is known among collectors as "Cipher Back" or "Puzzle Back". Would you like to add it to your collection? I will put it in a waterproof bag, sandwich it between cardboard and corrugated cardboard, and ship it via Yu Packet Mini. *I am also listing this on other apps, so I will sell to the first person to apply to purchase. I am also selling it on Yahoo Auctions. If you don't mind either platform, I would appreciate it if you could buy it from Yahoo Auctions since the sales commission is different.