DescriptionDrafting brush, model 3511, made by Keuffel & Esser Co., no date, circa 1940s-1960. Varnished wood, 14-1/4" long x 1/2" thick x 3" overall height including 2" long bristles. Marked: 100% Horse Hair Sterilized. K+E factory was in Hoboken during the estimated period of when this was made. To be researched for more precise date of issue.