
Waterman has produced several filling mechanisms in addition to the lever-fillers and eyedroppers; for example, there was also the “coin filler.” The coin filler operates with a prop: Waterman provided a special “coin” to use with these pens. In the side of the barrel is an open rectangular shaped slot under which is a press bar. Once depressed by the special coin (or of course anything else the user might decide to use), the bladder was evacuated …