I bought this on eBay. I had seen them in old catalogs, but never laid eyes
on one. Use prohibited by NEC section 384-16 (e)beginning with the 1978 edition.
The date on the box is May 27 1963, so it's almost as old as I am.
(edited to post clearer images)
[This message has been edited by electure (edited 01-08-2005).]