Guglielmo Achille Cavellini ( 1914 - 1990 ) was an Italian painter. Guglielmo Achille Cavellini s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 441.2 USD for Performance in 2008 to 4411.95 USD for Cassa N. 7, 1968 in 2008 , based on the size and medium of the artwork.