if it is the standard size cartridge it wont fit the baron. The end of the pen is too small for thr crtridge to fit in. The post end not the nib end. Dont know about the others.
All of our fountainn pen kits use International Standard cartridges. Some kits can accept the long cartridges (and short ones also) and some can only accept the short ones. Here is a good place to get info on cartridges: http://www.pendemonium.com/ink.htm
The Waterman cartridges should work if the pen in question will accept the longer cartridges, if those are the ones you are asking about.