Any ideas? The vendor said it takes glass cartridges. It is not a C/F, obviously. It is French, but appears to have U.S. parts. And the top unscrews as well as the bottom! Why? From a distance, I thought this was either an Italian pen or an Eversharp. Was surprised when I saw it was a Waterman. Approx age? And what should I look for to fill it with ink?
It feels surprisingly good in the hand. Closed, it is surprisingly small, but posted it is very well balanced. And there's noticeable flex to the nib (I expect nothing less from Watermans). Would love to get this going again.