Beveridge speakers-does anyone still use them?

I have just scored six (6) panels for the Beverage Two series speakers, but I am not sure if they are for the 2SW or the earlier Two model? What identifies them as to which model they are from -> Dimensions, wiring?
The neatly hand written (with red "Sharpie") info along the panel edge says => B1-10-06-87
Other edge writing shows:
B1-2.45 / 2.28 = 4.80 NF and B1-3.0 / 3.0 = 3.1 Kv

I might try shopping for any matching Beverage speakers that may need working panels to be restored, or sell them to someone who already has such speakers and just wants/needs the panels.

Once I learn more about them, and depending on difficulty of finding units in need of restoration, I might end up just selling them, so I need to learn how to properly determine what condition they are in presently. in order to come up with a current fair market price.

What things are ctitical for doing a proper visual inspection? Some of them have a few tiny circular (<1mm dia.) spots scattered about them where reflectivity of the shiny aluminum layer appears to be gone.
How many of these can pe present before performance is significantly compromised?

I will post some PICs shortly.

I have confirmed that my six panels I received came from a Beveridege 2WS set of speakers.
Considering the small number of these speakers made and even smaller number still in being used regularly, there may not really be much of a market for the panels anymore.

So, the question is, to what purpose should these panels be used. Building new custom speakers with ancient panels does not seem so logical wihout the availabity of suitable H/V amps to match them properly, and building such amps is beyond my skill set.

I have now gathered more info about by ser of six (6) Beveridge panels.
Though they were removed from a set of 2SW speakers, they were not the original panels of those speakers, which in fact had been rebuilt using the later "circiut board" style panels. Their H-V amps had been accordingly modified to the lower voltage 3.2 Kv level of these panels, and the crossovers of the 2SW set was modified to match them.

Based on what I now have learned, it is my understanding is these these circuit board style panels are a proper match to the later Model 5, Model and perhaps some other models that used the 3.2Kv level of voltage and have the correct frequency match for proper crossover performance.

These should also be drop-in replacements for any model 2SW units that have already had the H-V 3.2 Kv adjustments previously done to their amps.

[IMG]http://i489.photobucket.com/albums/rr259/RRLedford/OnlineSelling/BeveridgeSpeakerPanels/20150918_080142_zpsmbtt7uyd.jpg[/IMG]

Panel ID info -
[URL=http://i489.photobucket.com/albums/rr259/RRLedford/OnlineSelling/BeveridgeSpeakerPanels/20150918_080142_zpsmbtt7uyd.jpg]Panel PIC[/URL]