These are pin-back buttons I purchased a few years ago. The original design button is from the second release. I opened it once, then put it in an OPP bag and stored it in a dark place. The deformed design button was purchased and stored in an OPP bag in a dark place, but the back side has rusted overall due to deterioration. It's quite difficult to see, but please be sure to check it before purchasing. (See image 4.) Please refrain from purchasing either button if you are overly concerned about condition. Individual Sales: Original Design Button: ¥666 Deformed Design Button: ¥555