Hi! Take this new photos, IMO the rivets are clearly unmessed so I guess the mark is period, made at the factory or not I don't know but may this distributor marks himself the blades he sell, also comparing with the 1st Geco mark (Sturm & Billy's bayo) it seems to be stamped as well. Inspected at hand the logo seems to be plated inside the letters, hope the photos put some light on this, best regards
