I was doing a Google search for Persian Qama and found these photo's of a Qama that had been sold. Here's a link for it(look at the hilt on the 7th pic down it's almost a twin to mine). The blade is different but the rivets on the hilt are the deciding factor I think. But, I still love it even if it's not Roman.
http://oriental-arms.co.il/photos.php?id=1558
I got this answer from a fellow Nova Roman today(and it made me do the Google search):
"You have a Persian qama there and not a gladius. I have one myself that was
made about 20 years ago and distributed by Atlanta Cutlery. Oddly enough, I
wore it as a gladius since the only other Roman type blades available were
copies of the French & American foot artillery swords.
According to E. Oakeshott & Sir Mortimer Wheeler (two of the foremost 20th
century authorities on ancient and medieval weaponry), the Qama was a survival
or generational weapon that is likely descended from the Roman gladius but
there are some important differences between the two. During the period of
the Islamic Expansion through the Ayyubbid Period (632-1250 AD), such a weapon
was call a Khanjar, it was the direct ancestor of both the modern Khinjal of
Caucasus & Georgia as well as the Qama of Persia and the Ottoman Empire.
Some examples can also be found in Northern Afganistan and Usbekistan.
According to the Wheeler-Oakeshott classification of Middle Eastern Swords, the Type
III Syrio-Arabian sword has a similar blade and hilt that is similar to a
gladius.
You can find additional information by reviewing the hardcopy or e-catalogs
of the Higgins Armory Museum, the Army Museum & the Topkapi Museum
(Istambul), the State Antropological Museum & State Historical Museum (Moscow). There
are also some information in a book by L. A. Mayer (originally published in
1943) entitled Saracenic Arms and Armor. In this work, such a weapon is
referred to as a Khanjar.
First, you will note that your blade is a full tang model on to which the
polished horn scales have been riveted with copper. Surviving Roman blades did
not employ this shaped full-tang method of forging a sword. Also, there are
no examples of Roman gladii which used polished buffalo horn for the handle.
The most common materials were ivory, bone, wood, and (occasionally) silver
or bronze. Also, Roman hilts were usually fashioned in separate pieces
(pommel, handle or built up handle, and guard and sometimes with the handle &
guard in one piece but virtually always with a separate pommel).
Considering Italy's involvement in North African (Libya), Ethiopia, and the
Middle East during periods of the 19th and 20th centuries, it is not
surprising to see such a weapon in Italy. Heck, there is a current auction on eBay
in which someone is selling a Jambiya that was picked up in Iraq. Nice piece
it is too."
--From Flavius Galerius Aurelianus
Quintus Servilius Priscus