Jim, have you or any-one else got any pictures on file of a hooked quillon that you know has had the hook welded on, please, that you could share with us to give us a better idea? All the dozen or so 1907s which I have are non hookers. Part of the problem is when the 1907 has had the hook originally, been cut off but then welded back on again, about 90 years later. The bayonet itself is correct it's just determining whether or not the hook has ever been removed.