welcome !
the year could be
٥ ٧ ١٢ 1275 AH = 1858 with ٥ (the 5) being written a little above the other 3 numbers, that would be my guess....
That date would be in line / correspond with the Bosnian yataghans you can find made between 1800 - 1878
And the stones are indeed very nice Adriatic coral; carnelian is mostly used for bichaqs
and the handle / grip looks indeed like walrus...could be ivory but am not sure about the latter
as you are new on the forum, some more info on this cold weapon:
on cornelian or carnelian :
https://www.vikingsword.com/vb/showp...0&postcount=12
a little on yataghans :
https://jatagani.hismus.hr/webe/oruzje.htm
and scroll to the top :
http://www.vikingsword.com/vb/showth...highlight=Kozo
material to compare your very nice yataghan, you can find here:
http://www.vikingsword.com/vb/showth...ghlight=zagreb
examples of coral, see enclosed pics