i found these now-discontinued, new-old-stock rotring 600 old-style FPs on sale in my local bookstore here in manila yesterday, and they were so good and so cheap (at P1,400 or US$31 each!) that i bought two of them and might end up buying more:



the silver 600 is slightly longer than the black one, and has a knurled section (also around the cap at the top). these pens are heavy! the EF nib on the black 600 is a nail, but the M one on the silver is very smooth.