No, I generally use my labelled as "Plossls", but when I took them apart, and blacken the lens edges, are really symmetrical (also called dialsight)eyepieces instead.
http://www.quadibloc.com/science/images/eyevar34.gif
Keen to take eyepieces apart and experiment.
The Kellners come in real handy when you have kids around wanting to see thru your scope and they will touch the lens despite you tell them not to.
Bill