Excited to add a Campus 5 to my collection. This one is a 5B as it has a SRV and was designed to burn unleaded fuel (I run it on Coleman fuel). The 5 burns kerosene. The case was a little rough when I got it. Stripped it down to bare metal, primed and painted but not much I could about the pitting after 70+ years of neglect. The round SRV looks like it was designed to keep us civilians from monkeying around with it. Built a tool to clamp in my vise. Worked great after soaking the SRV in liquid wrench for a week. New seals, lead washers and a flame spreader made from one of my spares that I had to modify (the original had some broken tabs) it's ready to fire up. Burns well but finicky at times. Simmered nicely too. Note there is no pump on this model as it self pressurizes itself nicely once it's up and running. Some say that's from the steel bar that joins the tank and burner but I think not. It never got more than just warm from my experience. I believe the steel bar is simply for support. Control knob is well marked on the underside. Thanks for looking!