The thin blade, riveted to the handle tells me this is a tobacco knife (see picture). These were made by local manufacturers, so there are quite a few variations. Tobacco used to come in twists or ropes, and had to be chopped and sometimes shredded to smoke. (It can still be purchased in this form.) The general form of yours is identifiable, though I haven't seen the small serrated blades on the back before, and it looks like somebody found the job to be thirsty work.