Hey All, I bought 7 of these beauties at a local yard sale. Does anyone have any info regarding these lamps like make, model, year, resale value, and any additional history? These lamps are quite large! My foot is featured in photo #2 to add some sense of scale (I wear a women's size 8). Also I am considering converting them to battery powered lamps to increase the resale value. Can anyone tell me if this is a good or bad idea? Any other tips or info is much appreciated!