A cast brass or bronze industrial nameplate manufactured by The De Laval Separator Company. The oval-shaped plate features a raised border and two mounting holes positioned at the lateral ends. The upper portion displays the manufacturer name DE LAVAL in raised serif characters. The lower section identifies the unit as No 15, with the lower-case o underlined and smaller than the N, flanked by two raised five-pointed stars. This specific model plate was used to identify early 20th-century centrifugal cream separator units. Dimensions: 5 inches x 2 inches (estimated).