Newly found archival evidence (from Milan and Siena as well as De Paolis family) shows that “Sderci worked with Bisiachs mainly in Siena, and the only recorded time he visited Milan was for the wedding of Bisiach’s daughter Amina to Lorenzo De Paolis (famous cellist) in 1921 at their villa in Venegono Superiore, near Milan.” Historical Archive of Siena points out that “Igino Sderci emigrated to Florence on August 14, 1926” (not earlier) - Archivio Storico del Comune di Siena. Hence Igino’s early instrument Amatese Strad labeled ‘fecit in SIENA Anno 1924’.