Well after sweating bullets for a while and seeing this item go unsold, I was able to make a deal with the seller and this Plate, Mounting No 1 is now on its way here. And it only took 30 odd years to track one down.
I am beginning to suspect that when these Plates were first disposed of, the Army scavenged all related components to put back into the system. By the time the last ones were surplussed out, they were so obsolete they were disposed of with most or all fittings still attached.
The stripped plates would be a challenge for anyone to figure out if they bought a box at a disposal sale.
Now I just have two bits to find for it, an intact Aerial Base No. 10 Mk II, and that fiddly little steel packing plate that sits between this Plates, Mounting No. 1 and the wooden Variometer mounting bracket.
David
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