Help with yatagans' inscriptions

[Zifir]

Hi,
I could only read this part, but I am very curious about the circles. This is the first time I see such circles on a yatağan. Although I cannot read it, there are arabic letters and symbols inside the circles which I am not very familiar. Also if I remember correctly, I have seen the symbol, in which amel-i Halil is written, in elsewhere and somebody claimed it to be a Bektashi symbol.