Gymnasium and high school students were typically between 14 and 20 years old. A gymnasium student in September 1941 was likely born between 1921 and 1927.
The gymnasium and high school for boys was located on Otylii. The street name was changed to Ottilienstrasse when German occupation began in 1939. See
www.lodz-ghetto.com for a map of Otylii and the rest of the Lodz ghetto.