Such little utility knives are so hard to identify because they are not as popular for collecting as, say yataghans, and therefore are not studied as extensively. On top of that, simpler smaller knife forms were probably used over a large area of the Ottoman Empire. This one is not marked in any way that could provide some clue. It could have been made in Gabrovo, or it could have been made in a variety of other places in the Balkans or Asia Minor.
There is actually a book on Bulgarian shepherd's knives, but it is focused on shepherd's knives and not on other smaller knives and cutlery.
