I acquired this little gem in a recent swap and I'm very pleased. I always wanted one of the small Optimus or Primus brassies and now I've got one! It had a faulty NRV and dribbled fuel whenever I tried to run it so I had to make myself a removal tool which I'll post about separately. I don't think the burner is original as it's unmarked and it seems to be worn as the vaporised fuel sprays over to one side. I've cleaned the jet but it still ends up burning out of one side. Still, it's a cute little stove.