Probably from the French Tonkin campaign of the 1880s.
With naginata-style blades, and lavish gilt copper mounts.
Large, heavy single-edged example with iron mounts.
With exceptionally wide blade, forged with a hardened leading edge.
A fine example with silver overlaid spearhead and silver ferrule with niello inlay.
Modeled after the Chinese "guan dao", made of lacquered wood.