When the heir apparent Yusuf İzzeddin Efendi passed away in 1916, Mehmed Tevfik Bey (Biren) assumed the administration of his estate as guardian. The documents, which were shaped around issues such as the distribution of income among family members, expenditures made, and the administration of the estate, reached a significant volume and eventually became an independent collection. The collection, consisting of 4,048 documents produced between 1916 and 1968, is organized in 17 folders and 1,330 files.