Franco Grignani ( 1908 - 1999 ) was an Italian painter. Franco Grignani s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1540.91 USD for SENZA TITOLO (1967) in 2005 to 66838.96 USD for Operativo numerico (5) in 2017 , based on the size and medium of the artwork.