Waterman 9782 Stainless Steel Fountain Pen. The 9782 CF was one of the first cartridge pens to be introduced. It was made in the UK from around 1962 until around 1965 but production continued in France well into the 70's. It was a tremendous pen and it was highly thought of but the cartridges were not a standard size and when they were no longer available the majority of CF's were discarded. The converters are very difficult to find as well.
This model has the ink filler barrel (rare).