He He Ho Ho ...That'll bring the 111 crew out of the woodwork . The added distance between the spirit cup & the burner , would , I imagine ,greatly aid pre heating. Nick
It is an Optimus Cobra burner modified to fit in an a normal Optimus 111 or 111T box. The Cobra burner is left handed and i bit lower than the T-burner. Has then to be made right handed and lifted to fit nicely in a box made for the T-burner. Have a look at the link Parramethrol points to above.
This is an Cobra burner made for Norwegian Military, so it could be used in the old type Optimus 111 box. The preheating problem with the Cobra burner in very coold weather was also improved.