Proportion Chair - Posture Correction This was a gift, and I believe it's from Miyatake Seisakusho, but I'm not very familiar with it, so please understand. I used it, but I'm not using it anymore, so I'm putting it up for sale. There's some wear and tear, but no noticeable major scratches or stains, and I think it can still be used. However, this is a casual inspection, so there may be oversights. Please understand that this is a used item, and those who are overly concerned should refrain from purchasing. Please check the images.