DescriptionIrregular (french) curve, 8823-G, "Star Quality", made by Keuffel & Esser Co., no date, circa late 1940s - 1950s. Clear plastic with yellowish cast; blind stamp markings circa 8" x 3". For drafting and design. K+E factory was in Hoboken during the estimated period of when it was made. To be researched for more precise date of issue.