After seeing the link to the image of the QRS 78 RPM record,
I thought people might be interested to know that QRS also sold radio
tubes.  I recently ran across an old add for these.  An image of the
ad can be found at http://www.pianorollstuff.com/_disc3/0000000b.htm

Are there any other products that were sold by QRS?

Regards,
John W Miller