Mexican Knuckle Duster Souvenir Knife

A vintage knuckle duster knife made in Mexico by "10CB." It was most likely a souvenir. I have seen other listings put these down as being from the 1950s but it may be newer than that; the quality is better than typical wall decor and tourist blades so it most likely does date from before the 1990s. The blade has a Mexican Spanish engraving, "Pollo que no Sirva para gallo, capalo." According to google that means "the chicken that doesn't obey the rooster, hat," so if anyone has a better translation please shoot me a message. The blade is 8 3/8" long by 1 1/2" and from end to end the knife is 12 7/8" long.