By the sixteenth century the boar sword had developed along the same lines as the boar spear. The blade of the sword had become narrow for the first two thirds of its length until at the end of the sword it widened out to normal width. They were usually fitted with cross guards at the end of the wide
portion portion of the blade and these were often spring loaded to pop out into place when necessary. Some of these boar swords had the final blade part made in the manner of a flamberge.
Note: "Flamberge" is a style of sword with a wavy blade outline; something very similar to the design mentioned here is seen in the replica Boar Sword show above this quote.