I've been fortunate enough(hopefully) to pick up a 147 is visually good condition for somewhat a reasonable price off eBay. I'm finding it hard to determine what type of nib its using, I usually use a Lamy 2000 and it writes as thick as the Lamy in an M, I'd assume therefore its a B nib, however the tip is very "square". Also the nib has a very narrow angle of writing, turn it slightly and it stops, however it does work upside down. Not sure if this helps, but it appears to be a pre-97 model as theres no pix under the clip but has a ID number (unless of course I've been had and its fake lol)