Very nice display, those tubes look "off the assembly line" brand new!
Reading through the replies asking whether the Iconoscope is still any good, I personally think if there's no whiteness around the getters then it's still under vacuum and would likely be good for use, my RCA 1846 Iconoscope tube I recently got working in my homemade camera is outputting a picture. I was advised with vintage tubes that have been doormat for decades to fire up the tube heater at 3V for 2 hours and then 5V for 1 hour to rejuvinate them and so I did that with my 1846 and it's working!
Those not aware of my homemade Iconoscope camera here is the link to my thread on it
http://videokarma.org/showthread.php?t=263849 .