Did The Ottomans ever use guardless sabres?
 

Of course the Ottomans had the Yataghan, and the Shashka was also not unfamiliar to them I presume, but did the Ottomans also use guardless sabres of their own manufacture? As in Sabres that essentially looks like a Kilij without a guard. I found only these two examples online.

I believe those are examples of incomplete/unfinished swords. Some of the hilts in the photos you provided clearly have cutouts for the langets of the crossguard (see the red arrows) that is obviously missing.
However, most of these hilts seem to be unfinished replacements, as they are very crudely made and not of the usual materials. This is more obvious from the photos I added.
What would you do if during a military campaign your hilt gets broken?! Of course you'll have it repaired as soon as possible with whatever you have at hand, hoping you will have it properly done later on... if you survive and have the money for it.

Algerian palas
 

The Algerian palas, are a known example without guard, however, they are rare. Also they are some pirate swords from the same area, North Africa.

perhaps this can add to the discussion, page 1 and 2 of :

http://www.vikingsword.com/vb/showth...ight=Dalmatian

http://www.vikingsword.com/vb/showpo...2&postcount=80