I think this is a swagger thrust stick from WWII made by Knife Crafters of Philadelphia. The blade's style is reminiscent of a German long dagger but this one is much longer, not marked, and if you look at the blade up by the handle as shown, it appears the blade has a core and covering indicative of a much higher crafted steel. The blade is affixed well into the hilt and there is no play.
Same goes for the blade in the scabbard. High quality fit, not loose. What kind of blows you away is the length of the blade at 17.75 inches and the fact that the edges are flattened and not sharp until you get to the last 4 inches or so then it gets a sharp edge but as you can also see it in the pictures, this last 4 inches is heat treated and a much harder steel point if I don't miss my guess.This dagger is definitely made for thrusting more so than any other dagger I've seen. The leather is in very good condition for what is there and the scabbard does not droop when held horizontally (not that I handle it so, but I did test it). I've never seen anything quite like it before besides the typical swagger stick pig sticker, but this is something else. Much longer, much higher quality. I pack well and insure everything. The item "WWII KNIFE CRAFT PHILADELPHIA DAGGER 24 / 17.75 THRUSTING HEAT TREATED BLADE" is in sale since Monday, February 11, 2019. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\Japan\Edged Weapons". The seller is "willduer" and is located in Galena, Illinois. This item can be shipped to United States, Canada, Australia, Taiwan, Thailand, Hong Kong, Bahamas, Mexico, Norway, Qatar, Kuwait, Bahrain, Uruguay.