This is a calendar photo set by Senri Oe. There are a total of 18 photo cards. One calendar has marks like cellophane tape. Also, there are some dates marked with a circle in pen. There are no markings on the photo cards. I do not have any pets or smoke. However, this item has been stored at home and is old, so there may be some yellowing due to age. Please refrain from purchasing if you are sensitive to this. Thank you.