I'm slowly whittling down the list of U#s to add to my G.P. Co. collection in 2020. Always seeking crude, unusual or colorful insulators (and ephemera, like this blotter!) but especially looking for the U#s below:

U-200 U-200A U-265B U-295B U-211 marked U-282 any blue in color and ones with early oval marking U-285 U-611 in light yellow brown U-529 U-597 U-600B U-601 U-611 U-625A U-642