In the second true edge stretta you are basically asked to perform what I’ve been taught is known as a cross-knock. But instead of beating his sword with your cross-guard, you are asked to use your lugs. (Presumably this would work with parrying hooks as well.)

As you make the strike, you step to the opponent’s right with both feet. I envision this as a compass step that puts you at a more or less right angle to the original line of engagement.

Attack options

You have three attack options after the cross-knock.

Pommel to the right temple

Riverso Tondo (i.e. Zwerch to his right)

Fendente (vertical Oberhauw)

I would argue the one you choose is contextually dependent on both how far away you end up from your opponent after the steps and what you would like to do next.

Craig Pitt-Pladdy translation

And so being with the enemy true-edge with true-edge, you will hit with the elcetto piccolo [lugs] of your sword inside his toward his left side, passing in such a hitting the left leg towards the right side of the enemy and the right leg will follow the left behind, and there you will take the right arm of your said enemy and you will give him the pommel of your sword to his right temple; but watch, if you did not want to make him the said hold, you will turn him in such hitting a roverso tondo or if you want a fendente on the head; but if you turned him the said roverso, for your defence retreat and retreat again and uncross your arms and if in this way you will make, you will extract yourself of the said megia spada safely.

Video Interpretation

Other Sources

There is at least one German manuscript that uses this technique for the longsword, ending in the riverso tondo. Unfortunately I don’t recall the name of the manual my instructor was using.