Good morning, I bought three stoves this week, 20 Euro the lot, they arrived yesterday. In fact I had no idea what I bought, what brands or models, but 20 Euro, I gave it a try. The first on e was a Primus 100 with roaring burner. The second one was a Optimus 00 with a silent burner. And now comes the surprise, the third one, no text or marks att all on the tank, not on the top, side or bottom. It had an Optimus roaring burner but I doubt that can be a clue. I happen to have a Radius 17 tank without burner and took that one to compare, it is quite like, but not att all. The burner connection is the same but the space between the fillercap and the nearest leg is different and the space between the pump and the nearest leg is different too. See for yourself: I guess you know my question, which brand could it be? Regards, Ton.