Middle Eastern Mystery Dagger #2 - Bird Head

[NovelsRus]

Hi, all,
First a big thanks to all the forum members who helped me I.D. that first mystery dagger (chainpuri churi), esp. Espada, who owns one himself. (That makes two of us on the planet that I know of, Esp.)

Now for the next mystery. My wife tells me her late great-uncle in Arkansas, a retired antiques dealer, used this dagger for years and years as a letter-opener. I've since seen these on eBay and elsewhere (at ludicrously inflated prices, I M H O), so I ceased all letter-opening activities, polished it, sharpened it (Arkansas whetstone, what else?) and now present it to you. What IS this thing? A mini Jambiya? Kenshar? Or is it.....a letter-opener?