This is a set of six postcards featuring original artwork by Shigeru Mizuki. The postcards feature original artwork from Kappa no Sanpei. They're wonderful! Even the typesetting, instructions, and tape marks have been reproduced. I believe these were merchandise from an original artwork exhibition about 10 years ago. There are no noticeable stains, but please understand that these are used items that have been handled by someone else before purchasing.