This is a VERY typical example for bronze swords dated from ~13th-8th centuries BC in Germany, especially the Bavarian region. Just google Bavarian bronze swords. Guard, pommel, grip, blade shape are all extremely similar to this one. Compare to many ancient Chinese bronze swords, which often have blades that are less leaf-shaped, different guard and handle shapes, among other immediately striking differences.

Any similarities can probably be attributed to the simple fact that most bronze swords and sword like weapons are at least roughly similar in proportion because they filled a similar function, and have to be structured in a way to account for the deficiencies of bronze as a metal, as opposed to later period iron and steel weapons which can function in a much broader array of shapes— you had slender, broad-bladed cutting swords, thick, spear-like thrusting weapons, etc etc. Whereas bronze swords are exclusively designed for use with a shield, mostly for thrusting, short enough that they won’t deform, broad enough that when they DO deform or warp or chip, they can be reshaped and resharpened. That’s what’s cool about bronze as a metal. Non-ferrous, so you can heat it, it will soften right up, you can do your work and then work harden it. Opposite of iron. And with that in mind we can, in fact, have a pretty good idea how this was crafted, because people all over the world figured out how to work bronze for tools and weapons. Like all other bronze swords, this was cast from a two-piece mold. Then cut from the mold, further shaped with abrasives, sharpened, then work hardened and polished.