Recommendations, letters and certificates attesting to the talents of Isaac Roet, an inventor by profession, 1943-1944

Recommendations, letters and certificates attesting to the talents of Isaac Roet, an inventor by profession, 1943-1944 Roet's inventions are listed in the file, including a calculator that makes bookkeeping work noticeably more efficient; the purpose of these certicicates and recommendations was to exempt Roet from deportation. - Certificate from the Jewish Council (Joodse Raad) attesting to the essential nature of Roet's work to the Jewish Council (p. 1), 03 February 1...