Once upon a time, Parker offered a 0.5mm pencil and matching ballpoint pen that matched the blue Duofold fountain pen (flat top, push mechanism). That product offering was discontinued, and now the only pencil offered is a 0.9mm pencil (which I have), and the ballpoint is a twist mechanism. However, since I collect sets I feel that mine is incomplete without the 0.5mm pencil and matching ballpoint pen. I sure would like to get my hamds on these!
Thanks,
Slick