File:Vintage Spectra Transistor Radio Sunglasses, Imported By Rudimac Corporation Of Montclair, New Jersey, Made In Japan, Circa 1965 (49284587717).jpg - Wikimedia Commons
Optical Emission-Line Spectra - D.E.Osterbrock
Motorola Astro Spectra VHF 110 Watts 128 CH 146-174 MHz W4 Ham for sale online | eBay
ASTRO® SPECTRA PLUS™ DIGITAL MOBILE TWO-WAY RADIO - Motorola Solutions - Asia