Selenium meter - Camera-wiki.org - The free camera encyclopedia
File:Vintage Petri 7s 35mm Rangefinder Film Camera, ATL (Around The Lens) Selenium Cell Light Meter, f2.8 Lens, Made In Japan, Produced From 1963 - 1973 (17220534782).jpg - Wikimedia Commons
The Zeiss Ikon Contax Camera Repair Website - Overhauling A Contax IIA/IIIA - Light Meter
Weston Master II Black cased selenium cell hand-held Cine exposure meter – MW Classic Cameras