This item was passed down from my grandfather, who received it when a relative who ran a home dressmaking shop closed down. I've researched the steel used for the blade, but it's difficult to say for sure as it was likely made around 1965 and is quite old. I've compared the sharpness to other blades, and it doesn't seem to be SK steel. Personally, I suspect it might be yellow paper steel. The "Ken no Kokoro" trademark is still in use today, but I'm not sure if it's the same manufacturer. I felt a connection to the discontinued items on their website, so it's likely the same trademark. The mid-Showa era was a time when many proud, artisan-made products came from Japan. The thread scissors I'm selling, branded "Ken no Kokoro," have a very distinctive body design. They have a sharp, stylish design that gives them a certain air of dignity. The size is 105mm, but they are generally smaller than typical scissors. There are minor scratches from use. The sharpness is excellent, with a clean cutting feel. I'm changing jobs and won't be using many scissors, so I'd like to pass these on to someone who will. This is a rare, vintage item. There are some rust marks, but I believe it's in relatively good condition for its age. Thank you.