The Oakeshott Type XIIIb sword is a one handed arming sword designed to combat the rise of heavier armors used by foot-soldiers on the battlefields of the 13th and 14th centuries.
While some sword makers developed swords that emphasized the thrust to pierce maille and other heavier armors that were starting to dominate the battlefield, Oakeshott Type XIIIb swords went in a different direction, and attempted to improve the cutting ability of the blade by widening it at the base, using a half length fuller, and optimizing the cutting surface at the center of percussion to shear through armor and tear into the flesh and bone beneath.
As the whole approach of these swords was cutting, the tip was spatulate in shape and the edges nearly parallel until the tip, swelling slightly at the base - but otherwise nearly completely straight.
Primarily used by mounted knights from horseback, a slash from one of these swords was devastatingly effective, tearing through maille armor and scattering foot-soldiers in its wake.
Surviving examples of original swords from Type XIIIb are very rare, and consequently replicas of this sub type are also correspondingly rare.
But whether by accident or design, some entry level manufacturers have come close - but to really nail this design, it is necessary to look to the high end of the market.
MyArmory has an excellent in depth article on the parent type Type XIII swords here which
explains their history and lists some high end reproductions and images
of actual antiques. It does not go into too much depth regarding the sub-type, but it does show some historical XIIIb.
And of course, you can - and should - read more about these swords and all the others in the Oakeshott Typology in his book, Records of the Medieval Sword
I hope this information on Oakeshott Type XIIIb Swords has been helpful. To return to Oakeshott Typology Made Easy from Oakeshott Type XIIIb Swords, click here