Maybe the ETF or some of us should stock up on these for future use.

Are they still good to use if they aren't sealed up?

These look like guns for small neck tubes.

http://cgi.ebay.com/Cathode-Ray-Tube-Gun-NEW-No-Reserve-FREE-Shipping-/150476897222?pt=Vintage_Electronics_R2

Those look like guns for 21CBp4.
They would still be good to use.
Next year is 1964 ?