QUOTE(Shangas @ Jun 23 2008, 12:06 AM) [snapback]648350[/snapback]
Repairing means that it's been returned to useable condition - but that's it. It works, but it probably still doesn't look flashy, perhaps it has brassing or scratches or a missing clip or whatever...but it'll write an essay with no problem.
If something is broken, and then fixed, it's a repair. I'd classify sealing a lip crack as a repair, not a restoration, although it has nothing to do with pen function.
Replacing a missing part could be either. Putting a clip on a pen might be a repair. Insuring that it's the correct clip for the pen moves it into the realm of restoration.
Polishing and removal of scratches would be restoration. Nothing broken is fixed, and the practice has nothing to do with repair. However, there are some that believe that this practice should be minimal in correct restoration.
When a repair is complete, you've got a pen that works. All parts will be intact and the pen will write, possibly very well. However, it might also be something that could cause a collector to recoil in horror.
When a restoration is complete, you've got a pen that works, composed (mostly) of the correct original parts, or correct substitutions. It can go into a collection as a example of that pen. Full restoration might be something that could cause a writer to recoil as well. For example, I went to some lengths to find the correct nib for a black/ivory OS Grieshaber that had a Sheaffer stub nib on it. The Grieshaber nib is nice, and its installation completed the restoration of the pen, but the nib is nowhere near as fun to write with as the Sheaffer nib was. Nonetheless, that Sheaffer nib is in my parts box, waiting for the right Sheaffer pen to show up needing a nib. With the correct nib on it, that Grieshaber is now worth much more to a collector than it was with the Sheaffer nib, regardless of the effect on the pen's writing capabilities.
So, I actually think the original poster was not picky enough (he didn't specify correct parts), although he may have been a bit too specific. I don't think a properly installed J-bar is really necessary in a piston-filler...