I was lucky to wing this black Waterman's CF with a 14K nib for just under $16 with its original box.
I was able to clean up the pen very nicely and it has very minimal corrosion around the nib which is very common for the models with gold nibs. I know that the CF ran from the 1950s to the early 1980s and I'm wondering which decade it is most likely to be from.
Here is the (only) picture from the ebay posting:
A picture I took before cleaning and polishing:
And with a writing sample:
So except for the little bit of corrosion around the nib area and the cap finial (barely), the pen is in very good cosmetic condition. I'm disappointed by the nib performance however. I find it to be very dry, rather stiff but still with semi-flex capabilities. I know the feed is working well since the nib is not railroading when flexing.
If you are wondering about the pink ink I used to refill the cartridge it is Thornton's pink. I use that to test vintage pens because it lets me check how clean the pen is.
I have not attempted to remove the nib but have use brass shims to try to spread the tines with very limited success. I noticed that the tines feel tight so I'm pretty confident the nib can be made a tad wetter.
As for the date the only hint I have is the patent number which was applied in 1954 and granted in 1957 ... which does not help me much with dating the pen:
Since the barrel has 'MADE IN USA' and considering the US operations folded in 1957 can I safely assume the pen was produced between 1954 and 1957 ?