This is a modified Optimus Hiker+ that was made for trials in the armed forces of a Nato country some years ago. A quantity of approximately 50 pcs were made. The majority of them were used in the test and evaluations by military personnel. The major difference to the standard Hiker+ were added accessories, jet optimized for jet type of fuel (NATO F-34), small improved details to box and pump rod. Image above shows "specials" like: - Clip in lid to hold the control key. - Clip in lid to hold a multitool / wrench. - Multitool. - Fire protective Nomex type of kitchen cloth. Detail of clips, control key and multitool. These units were also supplied with a filling funnel with gauze: Pump rod with old style free floating pump piston: Multitool designed to allow full stripping of stove in the field, including changing the NRV: Box fitted with more and stronger magnets for more reliable function of the magnetic cleaning needle: Burner detail: Let's fill it up. There's nothing like the smell of jet fuel on a Sunday afternoon... The jet orifice size was reduced to 0,30 mm (from original 0,32 mm) to reduce CO emissions and improve combustion of this pretty crude fuel. Ignition! Here's a steady blue flame, although hardly visible in the first shot: This version never came into serial production, so it's a rare piece. The Hiker+ (including this trial version) was the last stove model still being made in Sweden. They were manufactured in Gnosjö in the same factory that Optimus used for decades before.