Posting photos of this Svea 106 on the Gallery in hope that it's more unusual features may draw out some knowledgeable additional comments! I notice that none of the other '106's on Gallery at moment have the old 'Sievert' starburst logo which is on this one: Other features possibly relevant to dating are the classic Svea dimpled spirit cup and tank bottom stamp: And then there is the pan ring. This is embossed with the name of the Standard Oil Company. I know Svea and others later made fully customised promotional stoves for oil companies, but there is a difference here to others I have seen in that in this case only the pan ring is customised. There is good reason to believe that this ring has always been with the stove and both are in remarkably good condition. The stove doesn't show any signs of much use and even less of ever having been outdoors. The Standard Oil Company was broken up by anti-trust legal action in the US in 1911, but some of the successor entities seem to have inherited rights to continue using the name in some contexts and jurisdictions. So that definitely does not date the stove that early - so, taking all the various features and factors together, what sort of era could it date from?