While looking through images of Talhoffer's 1459 fechtbuch, I noticed that the single-handed swords being used all seemed to be type XVI, which I thought to be a rather late date for that type. There are a few more striking things about this sword that I noticed.

First, it shows up in the sword and large shield judicial duels whereas in the 1467 fechtbuch they use type XVa.
Second, its fuller only runs half-way up the blade, and the blade is shaped, generally, like a triangle, like the XV
Third, it is shown as being used on horseback against armoured opponents though not to great effect

So, can anyone suggest a typology for this sword, or suggest similar examples? It looks like some kind of XV variation but I haven't seen it before.

I've just been poking around in Oakeshott, and I think the swords may be of Type XVIIIa. From The Sword in the Age of Chivalry:

Ewart Oakeshott wrote:

SUB-TYPE XVIIIA CHARACTERISTICS A fairly slender blade, average length about 32". The section the same as XVIII, but some have a narrow fuller in the upper part. A single-handed type, but some are big weapons with quite long grips (about 5"). Pommel and cross may be of any type of style.

He later says that almost all of the examples are from the 15th century, so that would work out well with Talhoffer.

Max