I never saw a Coleman stove with a round fuel tank. I have 6 Coleman stoves, 1 is WWII 2 burner model. I also have WWII back pack model sold the other 2 back pack models. All are a little different so they all must be from different years. They are all for sale but no one seems to want these anymore everyone wants the propane model and I have one of those too. I just sold the newer modern back pack model. I like the large 2 burner model.