This topic is intended to show the various sizes and forms of the Waterman cartridges and converters over the years. As far as I know Waterman did invent the cartridge. First glass, later made of plastic, it has seen some different forms. Also there have been various converters, even within the same basic type the looks were different. Please post your pictures and accompanying information on this subject. Bear in mind that posts may be redacted to reach a comprehensive result. D.ick