Moshe Rynecki attended the School of Fine Arts in Warsaw in the 1906-1907 academic school year. (Note: From 1904 to 1932 the school was known as the School of Fine Arts in Warsaw. In 1932 it changed its name to the Academy of Fine Arts in Warsaw.) In 1907 the school published, “A Report of the hitherto activity of the School of Fine Arts in Warsaw for the period: March 1904 – June 1907.” This report included a section titled, “List of pupils.” Page 44 includes the name “Rynecki Moszek.” Moszek/ Moshek is a diminutive from Moshe.
[A special thank you to Piotr Nazaruk for tracking down this information and passing it along!]