I have a Matador Click "020" in good condition, except for its nib. This steel nib seems to have had its tines partially clipped off and smoothed, turning it into an awful stub nib. However, I have some hope for this pen. It has a screw-out nib unit, that seems to be similar to Pelikan nib units. Are those compatible? In another question, I have seen this pen with many clips, from a Waterman-style stepped clip, an arrow clip, a normal rectangular clip, all as military clips. Does anyone have any information on how the numbering of the pen relates to these clips, as well as if they have a steel or gold nib?