DescriptionErasing shield N3409; stamped metal with K&E logo. Made by Keuffel & Esser Co., no date, circa 1942-1955. Circa 30 guage stainless steel sheet metal with nickel finish, 2-3/8" high x 3-3/4" wide. With original printed stock envelope with model number; printed gummed adhesive label of Dayton Blue Print Company. Note the stamped name on template is: K & E CO. It is using an ampersand rather that the "+" symbol. The printed envelope has the "+'" symbol. These points would probably date it earlier than later, but the fact that it is made of stainless steel and that use of that metal would have probably been restricted for this use in World War II, makes it more likely to be postwar. Used in drafting and drawing work to mask area before using an eraser. Keuffel & Esser Co. main office and factories were in Hoboken in the period when this item was made.