The envelope for the photos is empty, the inscription on one side in the artist's handwriting: "Expopometer readings (not legible) 15 done - by 30 units", two letters are written in large letters in the hand of artist Rustam Khalfin: "ШХ" (probably the artist's skin); on the other side of the envelope is also the inscription in the artist's handwriting: "ШХ"