11 Set stuff

[cletrac (RIP)]

Those volt meters were made for the 11 set but their use likely continued after the 11 set wasn't used any more. The one I bought says 1943 and the 11 set had been long discontinued in the UK by then.
I got the counterpoise in the mail today. It's quite a bit smaller than I thought it was. The wires are insulated too so how does that do any grounding? You must have to push the grey end of the bobbins into the dirt.
The remote unit serial numbers go to about 18000. I'm starting to think this includes ones from the various countries since they all have the same ZA number. The remotes just went in wireless trucks and not AFVs. This means around 9000 trucks of various makes and all would likely have had charging switchboards. Does my reasoning make sense?
On the bonding straps topic they stopped a lot of static on the radio. Also, when they were using the truck itself for the aerial ground, would they not ensure better aerial functioning?