Found these information in web:
http://www.group.intesasanpaolo.com/scriptIsir0/si09/chi_siamo/eng_istituto_bancario_san_paolo.jsp#/chi_siamo/eng_istituto_bancario_san_paolo.jsp
http://www.catawiki.com/catalog/banknotes/series/istituto-bancario-san-paolo-di-torino/1892307-italy-50-lire
http://www.ebay.com/itm/Italie-Italia-50-lire-I-Bancario-San-Paolo-di-Torino-/110751489849