Ottoman dagger, 19th century, steel, gold, jade, ruby, emerald, diamond. L. 19 1/16 in. (48.4 cm); L. of blade 14 5/8 in. (37.1 cm); W. 1 7/8 in. (4.8 cm); D. 1 1/4 in. (3.2 cm); Wt.14.3 oz. (405.4 g), Met Museum.
These unusual hudiedao feature handles and blades that are both based on traditional Chinese fighting knives. In this case the blade has been made both longer and wider. Fighting knives do not commonly have hand guards, which are also missing from this example. I have seen a couple of sets of knives in this configuration, though they seem to be quite rare. These knives are 49 cm long and 65 mm wide at the broadest point. Probably early 20th century.
Bauernwehr/Lange Messer - Where possesion of double-edged swords was prohibited, singled edged Lange Messer (long knife) & Bauernwehr (peasant's weapon) became popular among ordinary citizens for self defense.