1920-1980c. mainly American auctions (over 100 catalogues) including better names sales like Sir Nicholas Waterhouse "The fine collection of the United States by Puttick & Simpson (1924, rare sale including plates), older/smaller auction houses like Plumridge, Charles F. Meroni Sales, Siegel, Stanley Gibbons, Irwin Heiman, Kelleher, Paige etc. in large box
