Head of the German military intelligence service, the Abwehr, during World War II. An ardent opponent of Hitler who saved hundreds of Jews from persecution, Canaris was court-martialed by the SS and executed by strangulation at the Flossenbürg concentration camp. ALS, signed “Canaris,” one page, 5.75 x 7.5, Albergo Palazzo Ambasciatori letterhead, no date. Canaris extends a dinner invitation to naval medical officer Gustav Thermann and his wife in Munich a few days hence. In fine condition, with one mailing fold. R&R COA.