There's quite a few more types of Soviet / Russian VFDs, especially
once you get out of the IV-## numbering format. Dieter's data archive
at
http://www.tube-tester.com/sites/nixie/dat_arch.htm (scroll down to
"Russian Tube Factories") has a huge amount of information, both full
data books and individual tube data sheets. Knowledge of Russian is
helpful. 8-}
Newer displays seem to be trending towards the gigantic rather than
the miniature. The ILC1-1/7 is a 7-segment display bigger than a soda
can:
http://www.decadecounter.com/vta/articleview.php?item=1072
The UDT-3 is a 9 x 7 dot matrix display the same size as the ILC1-1/7.
The ILV2-5/7M2 is a smaller display in the same style envelope which
is a 5 x 7 RGB VFD.
This is a special-purpose VFD panel:
http://www.tmk.com/transient/6F5S8587-s.jpg
This is the largest Russian VFD I know of, a 128 x 128 matrix display:
http://www.tmk.com/transient/6F5S8655-s.jpg
If you expand beyond VFDs, you can find many bizarre devices. The
ITM2M is a truly bizarre tube which is a high-voltage RGBY display in
a 2 x 2 format, designed for making giant display panels (with equally
giant power requirements).