For whatever reason- and this is a very vague intuition- something says Empire, about those. As in Empire Scientific- the company that made the Grenadier speakers and such.
I had the impression that Janszen used CTS, and those look a little more orangey than the OP's speakers, but you could be onto something. The basket edge looks different, but the cone does look very similar.
I had the impression that Janszen used CTS, and those look a little more orangey than the OP's speakers, but you could be onto something. The basket edge looks different, but the cone does look very similar.