I looked up XVIII.3 in Records - it's a good looking sword with a more slender blade than what we had been expecting. It looks like what the general population might think of as the quintessential late medieval sword.

I always had trouble understanding why the more slender swords like XVIII.3 and XVIII.4 should be exactly the same type as the short, broad Henry V sword, and the Kingmaker as originally drawn.

And could someone please tell me what defines an XVIIId?