[Ron Ramirez]

Sears contracted with others (notably Colonial Radio) to make their Silvertone line of radios...but not with Philco. As far as I know the only other manufacturers Philco was involved with pre-war was the Radiobar Corporation (supplying chassis for the Radiobars) and IBM (a joint venture making two-way sound systems which included radio receiving equipment) for schools, industrial and maritime use.