I picked up this "Flamex" brand pipe lighter at a flea market today. It is unused and included the the box and operator booklet. I attempted to fill it with the butane nozzle used to fill my Thunderbird Zippo inserts, but it is too large. Does anyone have any idea on what brand/type butane might fit this tiny tube? It looks like a handy lighter to use and I'm curious as to how it works.