Hi, here are some photos of an early Radius No.5S:or. I acquired this particular stove from Deal in Kent in 2004, but I was cleaning it up today: The Radius pan-ring is interesting. It is fabricated from sheet steel but you can see how it has been influenced by earlier cast-iron pan-ring design. Radius moved to the more conventional, simpler design of pressed-steel pan-ring in later years. The final photograph shows this Radius No.5S:or alongside my Radius No.1C. The tanks of the two stoves are almost idential, suggesting thet they are near-contemporaries. Best Regards, Kerophile.