Well i can help you, that sword is realy not a yatagan, i know it has ears
but it is not yatagan.
That sword is from Kotor or Risno in Montenegro, it is called Pala, it has nothing to do with the soo caled ottoman pala nor with yatagan.
There are two versions, both have a straight blade, and your version has smaler slender ears from ivory, valrus or bone, and other version is made of silver and is without ears but looks like cubed bird head.
There is shorter and longer version of it, and hasrma is usualy from silver and scabbard from thick beautifuly graved silver.
Your is in bad condition and is tampered with, but for the price you payd it is ok.
In good condition and proper mountings they are very rare and very expensive.
Guy from my country was seling it.