A second WW2 dated military Monitor to help redress the balance against the 4 current Thermidor examples! Features the same complex lock-off pump mechanism, with its accompanying hex bar pump rod, as the others posted. Main point of contrast I can see between the Thermidor and Monitor examples is the very weak legends on the Monitors ( see also https://classiccampstoves.com/threads/25865 ). On this one even the first and last lines of the lighting up instructions are barely registered. But at least it was nice and clear which type of fuel was required and who it belonged to .