Donor wrote, "At the same time that silicon technology was progressing through the 1960s and into the 1970s, gallium arsenide semiconductor technology was also advancing, as shown by these solid-state numerical digits. These 14 segment LED (light emitting diode) displays were manufactured by Monsanto, and widely used in solid state numerical presentations." Handwritten on yellow paper is, "ASSY RV7 ON PACKAGE 41."
