I just bought my first ever marbled Phileas. It's used and comes with no converter or cartridges. I'm having it delivered to my Florida address but it will be a bit of a pain that I can't write with it as I don't have any Waterman cartridges or converters. Can someone please advise me which version of converter is the right type for a pen like this, as I prefer to try and find the version it would have had originally. Are we talking about the one with the piece of metal at the end?