Well, another new pen for me. It's my first Waterman fountain pen. I'm not completely sure what I have, but I've narrowed it down to and Ideal #3 or #5. I got it non-working. The sac was actually gooey inside. I replaced it last night, and inked it up today. It's REALLY wet. Too wet, in fact. The nib is a 14K, and is marked Ideal Rigid, and has the number 5 stamped on it. So, what do I have? And, despite the flood, and a fairly loose fitting nib, it writes really nicely.