This is the Radius 12 I recently acquired for a very good friend. He gave me permission to post it here. It's a complete set in very good condition; even the seals appear to be original. I haven't fired it up yet; that's my friend's next task. However, I couldn't resist giving it a little cleaning for some nice photos. I guess this example was manufactured in the early 1920s. According to the 1920 catalog, the Radius 12 was sold with folding legs and without a tin and the Radius 22 had the same dimensions, came in a tin and had no folding legs. So, there seems to have been some inconsistency towards the end of the Radius 12's production, as it's no longer mentioned in the 1925 catalog. I think the last No.12 tanks were sold as No.22 stove sometimes before 1925.
@Assel An excellent example of the 12 you have, for the age every part is in great but used condition, the tin has all its graphics and very little rust even the filler and reserve caps have original Radius made seals may be replacements.