w5sum

good morning, new guy here. I'm Ronnie in Shreveport, La. I acquired a very nice speaker recently in a steel cabinet with a handle on top, for the purpose of using with my vintage restored military receivers. Upon taking the back off, it has a "Cinaudagraph Speakers, Chicago Ill" label, and the only part number I can find is NZ 10-12 and the date 8-15-41 Can anyone tell me the specs on this speaker? It is 10" across. 8 ohms? 600 ohms? 2000 ohms? thanks so much Ronnie Hull Shreveport, La