Hello, my father was cleaning out his attic and discovered a pen, which he thought had belonged to me when a student. He gave it to my son and I became suspicious when I tried to fill it with ink and saw it had an unusual piston type mechanism which I wasn't familiar with. I've done a bit of research and believe it to be a Montblanc. This is certainly possible since my parents have boxes of letters, photographs etc. belonging to ancestors, some of whom would have been able to afford a Montblanc pen! I haven't taken any photos as yet but found this on Pinterest and the pen I have looks pretty m