[Ian]

Looking through the excellent museum compilation, I noted this interesting piece. A straight yataghan said to be from a cut down saber. Here is the Museum entry:

Hrvatski povijesni muzej / Croatian History Museum, Zagreb, Croatia
Arms and Armoury Collection
DARK-HILTED YATAGAN WITH STRAIGHT BLADE. Hilt: second half of 18th century - around 1830; blade: first half of 18th century
steel, bone; forging, carving
yatagan: 765 : 625 : 35 mm
Inv. No.: HPM/PMH-013054


DESCRIPTION:
A hilt of dark bone with quite large truncated ears. Band of metal decorated with plant adornment, and on the continuation of the hilt with a fish scale motif. Blade reworked from a cutlass, steel, single-edged, straight, with two narrow and two broad fullers.
Wants scabbard. Bone and metal parts of the hilt fairly damaged. Leaf-shaped decoration of the blade missing.
Came into the Museum with the Jelacic Bequest in 1937.

BIBLIOGRAPHY:
Boskovic, Dora. Zbirka jatagana u Hrvatskom povijesnom muzeju u Zagrebu = The Yatagan Collection of the Croatian History Museum, Zagreb. Katalog muzejskih zbirki XLI. Zagreb : Hrvatski povijesni muzej, 2006. Kat. No. 189;
Sercer, Marija. Jatagani u Povijesnom muzeju Hrvatske. Katalog muzejskih zbirki XI. Zagreb : Povijesni muzej Hrvatske, 1975. Kat. Nr. 172.

In referring to the hilt as "bone," I think they mean horn.