Pre-1920 Radius No.13, not previously represented in the gallery. Rebuilt from a sad wreck that was too interesting to pass by. Here it was after the initial dust over: One very disturbed state original Radius D137 burner, and what was under all of that solder at the riser base? Well, completely buried inside all of that old solder, thankfully, was an original D2305 detachable riser: Not so detachable in practice, however, it is immovably sold on the base fixing which itself span freely on the tank top, no doubt the reason for all of that old solder work! So the detachable riser is staying that way, and just sufficient new solder work done to make a sound seal between the tank top and the thin riser base flange. In any case the original travel cap and its tank top retaining ring are both long gone, the latter most likely lost whenever the original solder repair work was done. Next new legs had to be made, and then there was the issue of the burner. In the end I plumped, temporarily, for an equivalently 'shrunken head' aged Primus unit. From a distance it looks almost indistinguishable from the even worse state original unit, right down t being dwarfed by the genuine NOS Radius flame spreader: In practice the new tank top seal held after some final tweaks with a copper head hand solder iron, but the burner was rather exuberant: A replacement jet made all the difference, everything is now good: Attempting to date this stove has not been easy. There are a whole range of different sizes of collapsible stoves, both silent and roarer, offered in the 1920 Radius catalogue. But even at that early date all are shown with under-folding legs, well ahead of any of Radius' competitors offering that form of leg. The assumption has to be that those very few examples of Radius collapsible stoves with fixed legs, and flat filler caps, must date from before 1920. At the time of writing such examples are only known for model numbers 12, 19, 22 and 23; with 13 added now. @Dutchmike @threedots @Hubert Sims @joshua
A potential complication to some of the dating assessment arguments above has emerged. A 1925 French Radius catalogue shows a model 25, not shown in 1920, but sporting the same fixed feet as here. The text also appears to suggest that the models 22,23 & 24 then also shared those same fixed feet too. There is, however, no mention of any of the models 11-19 still being available then. (Credit to @Knee)
