Only a fraction of the records in the archival fonds of Willy Menzel, Trutnov, have been preserved. Until 1945 they were probably kept at the company's record office in Poříčí near Trutnov, from where they were transferred to the business archives of the state-owned enterprise Texlen in Trutnov at the end of the 1950s. There is no detailed information on pre-1960 records; therefore, it is not possible to determine their original scope, or how many were destroyed prior to the transfer to the business archives. The archival fonds is now in the State District Archives in Trutnov.