Iain Macnab ( 1890 - 1967 ) was a British painter. Iain Macnab s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 416.71 USD for Portrait of a gentleman, bust-length, in a trench coat and hat in 2008 to 7130.82 USD for Nude in 2015 , based on the size and medium of the artwork.