Bell Telephone Labs Rotary Brush Vacuum Shoe Cleaner being used by RA Duclos before entering the controlled environment area. Dated 1958. There is some minor rippling from the article glued to the ...
Bell Telephone Labs Transistor Assemblies being inspected under a pressurized hood by A. Marx. Dated 1958. There is some minor rippling from the article glued to the back.This photo measures 8 x 10...
