As received, Optimus 8f. Missing flame spreader but otherwise good to go. The fuel line on this model has no hex nut, I can see some thread tape in the connection which indicates the lack of the nut makes it more difficult to tighten the fuel line. The fuel line is thicker than an 8r so I guess it can handle more torque when tightening. Chrome tank embossed case The second stove in the photos is a chrome tank 8r. The 8 has the small pole under the burner.