Hi,
I could not read the upper part of the seal of Soleiman, but the rest is
amel-i Mustafa (swordmaker Mustafa)
I think the first part of the inscription is erased, you can see last part of a word just before "olsun"
The rest of the inscription is:
Olsun Mübarek Muradını Versin Ona Hak Te'ala ve Tebarek
Let......be blessed and May God who is hallowed and exalted grant him his wish
We can guess that the missing part is probably saying that Let this yatagan be blessed for his owner. Thus the whole inscription is:
Let this yatagan (or knife) be blessed for its owner and May God who is hallowed and exalted grant him his wish
(Just a wild guess though

)
If it is possible I would nice to see the whole picture of the yatağan.
Best,