That's a nice looking thing. Similar to a Primus #5 that I have, only without the brasso and elbow grease treatment!
I love these stoves. Recently acquired an 80yr old Primus #51 that wasn't working. The non-return-valve in the priming pump was stuck. Got a replacement valve and tool off eBay, but couldn' get the old one out, eventually rounded off the head, thought it was stuck forever! Eventually managed to unsolder and remove the entire pump tube to get at the stuck valve and replace it, then resolder it all. Was great when it fired into life and boiled my kettle. Love the maintainability of these things.