Hi,

Some pens have the clear urethane pistons. Tell me what colour the plunger of your pen is and what inks you used in it.

I'll start off:
light pink plungers
Quink Black

Clear Plungers
Pelikan Fount India
Aurora Blue
Platinum Blue Black
Pelikan Blue
Omas Green
Pelikan Turquoise
Sheaffer Peacock blue
Diamine Emerald
Pelikan Brilliant Green
(Pelikan Violet) possibly, but unsure.

On the other side, stained reservoirs:
Yellow reservoirs
Pilot Black
Quink Black

Dillon