This is a brilliantly engineered, unusual and quite ingenious semi-automatic pocket lighter designed by Julius Franz Meister in Austria, back in the 1953. This model was made by the IMCO company and was named PRIMEX 6300. Has been crafted in solid chromed steel with engine turned lattice decorations. This lighter is very rare and not many has been manufactured, it is in unused grade, never fired and in very mint condition. It has a removable fuel chamber and a total of 3 pushbuttons on the sides, two at the front and one at the rear. Can be operated by the thumb push at the top of the lighter to activate the wheel and fire. After operating, the first pushbutton allows the wind-guard to be raised during use. The second pushbutton allows the fuel chamber to be ejected and the third pushbutton is for flint changing, by raising the flint wheel actuator and opening the back of the lighter. Quite ingenious. There are two versions for the name of this lighter, both are very rare; the "Perplex" and the "Primex", but technically they are the same; in design, materials and measures. The one with named Primex is a lot more rarer than the Perplex. Model: Primex 6300, also know as Perplex 6300. Materials: Chromed Steel Weight: Lighter alone is 60.8 Grams. Measurements: 64 mm by 47 mm by 14 mm (2.52 x 1.85 x 0.55 Inches). Rarity: Very rare in mint and never fired condition. Marks: Stamped with the maker's mark and signed as follow; "IMCO PRIMEX PATENT AUSTRIA 6300". This piece is empty of any flammable, gas or butane substances and is ready to be ship by any carrier. Collateral: This lighter is accompanied by the original transparent plastic carry-on sleeve case and the original folded paper instructions.