The Sheaffer Intrigue is a different kind of pen in terms of innovative design in structure and function:
It has a filling system that could be described as a hybrid converter/cartridge affair, very well engineered and designed. The pen is large and, whilst not being particularly long feels quite heavy and very 'chunky', a very tactile pen.
You're either going to love or hate this pen, I love it.
I have a Sheaffer Intrigue 616 triple set, this model, available here.