Up for Sale is a Cetron/ Richardson JAN-5684 Electron Vacuum Ballast Tube 

DLA900-84-M-8798 

NSN No. 5960-00-228-3786 (I am not including the original box because it is very tattered and worn)

I have 2 of these in stock. This sale is for 1. Both appear to be UNUSED (but I cant say for sure). 

I am selling it AS IS. Untested.