Four gorgeous pens here. You can buy them one at a time, or the whole set. This is a wonderful series of pens. These are patterened after the Opera Master series. The cap and uncap with the same 1/4 turn, Hook Safe closure as the Master and the Homo Sapiens pens. The full with the same Double Reservoir, Powerfiller mechanism. The plunger rod is plastic, however it is substantial, quite solid. Maybe better, IMO. They are a little smaller in length. They come in 4  translucent, deep, rich colors, and they also have a clear ink window. The nibs are 14K Gold, in Medium. Of course, they write very well, similar to what you would expect from a Homo Sapiens. Street price ranges from $450-$650. The blue one was inkled once, the others, never. Boxes included, of course.