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.

Baranyi,
You never answered Audiokenesis. What are you driving them with?

Roxy, the Beveridge 2 and 2SW's are self powered by their self contained OTL direct drive amplifiers. The speaker actually sits on top of the amplifier. The amplifier is the base of the speaker.

Thanks for the info Baranyi. I was curious myself. That is certainly an exotic arrangement, and it must sound beautiful. Does it generate a lot of heat?

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.