A companion piece to the then radically advanced Mondragon Rifle, this bayonet appears to follow a similar design philosophy to the U.S. "trowel" bayonet, using a spade-like blade that could be used as both a weapon and an entrenching tool. Briefly a trend in North American weapon design, which in theory would reduce the combat load of the individual soldier, such hybrid weapons had a relatively short life. The short life of the trowel-style bayonet as a genre and the relatively limited importation and deployment of the Mondragon in Mexico due to internal strife made for relatively few of these bayonets to be manufactured; few survive in any condition, let alone as nice as this example. Measuring 15 1/2 inches overall, the blade is 10 3/4 inches long and 2 1/2 inches wide, with a broad spear point, a prominent fullered rib running the full length, and "HIERRO."/"MADERA." marked along the sides of the rib. The guard has a roughly semi-circular profile, with "REPUBLICA MEXICANA" on the underside, and a vent hole on either side of the muzzle ring, and smooth hardwood grips. Included with the bayonet is an unmarked, blue finished iron sheath.

Fine overall. A small dent is visible on the left edge of the otherwise very fine blade, which is bright overall with minor scratches and spotting. The hilt has turned a mixed brown and gray patina, with some rust patches and dings on the grip panels. The sheath retains most of the original blue finish with some noticeable dents and surface rust. Writer cannot recall another example in recent times. An extremely rare bayonet!