DescriptionPackaging sleeve only for 12" triangular architect's scale, model 1621P, made by Keuffel & Esser Company, (Hoboken, N.J.), no date, circa 1940-1960. Triangular cardboard sleeve, 1-3/16" wide per side x 12-5/8"long, open both ends, covered with green paper with K&E blind embossed logo; printed paper label on one side. Marked with model number and "Keuffel & Esser Co. N.Y." and product line "Paragon." (Note: this item is sometimes mislabeled as an architect's scale.) K&E main offices and factory were in Hoboken during the period when this was manufactured.