Geoff, thanks kindly for providing insight to the Achilles subject. Now I have some follow up questions. . .
First the G Rod on the hull side. What is the detail at the top as indicated in the cropped photo below.
Found a similar looking rubber base which is described as the insulator, but maybe not the same thing as you have it being bendable if the turret/gun barrel is swung over the antenna?
Now to the front antenna as the WS19/22. Suppose the main bottom portion could be 21 inch length when compared to the one located on the hull side. The diameter does not match and should be about double compared to the WS19 example found. Unfortunately cannot find a WS22 to compare with. . .