all original vintage american industrial pollard factory machine shop adjustable height stool manufactured by the pollard brothers, chicago, il. the heavy gauge welded and riveted joint four-legged stool contains overlapping extension legs with multiple pre-drilled holes for height adjustment. the original "pollard green" baked enameled finish remains in great shape, considering age. original slightly contoured maple wood backrest supported by high tensile strength steel brackets. salvaged from an old chicago steam gauge factory. seat height measures 23 1/2 inches.