I purchased the tenkeyless type, and then wanting a tenkey type, I bought one, but accidentally purchased another tenkeyless type, which I had stored for a while. After opening the package, I kept it in a case with a calculator, so there is a faint scratch about 5 centimeters long on the back (see the last photo). As mentioned above, this item was purchased by mistake, so it has not been used for typing, etc. Manufacturer's HP https://www.realforce.co.jp/products/discontinued/R2TLSA-JP3-IV/