Gender: girl
School:
School #17B
We believe that Stefanja Muller is the S. Muller that signed the book because she was born 9 August 1929, making her the correct age for school #17B. Her occupation is listed as a student. It also says that he was either deported or simply changed his address on 8 August 1941. The new address is Sulzf 77.
We realized that he must have simply changed his address 20 August 1941 because deportation did not begin until after this date.