This is a Czech made back pack stove in brass (much like the Juwel 34) and comes with all it’s parts that are often missing like the spanner / key , the small funnel and the flame spreader. Also the 3 small pot carrier feet work well. There are clear sings of use but nothing extensive. Spanner, stove base as well as top and bottom of the blue metal case are signed with the Meva brand name. The bottom is stamped 361 which I assume dates it to March 1961. Do check the YouTube video I found below to see some of these vintage stoves working!