I am not an expert in this particular field but researching other signatures that are supposedly AC/DC ones and that have an affiliation with AFTAL (though that doesn't always mean anything), is that this could be non-authentic, but I am by NO means an expert in AC/DC. I am more interested in other areas of music, myself. However, can anyone else help? My penny's worth and gut instinct is non-authentic. However, my belief is you need someone else's opinion who has more experience in the field - can anyone help Martin? Thanks, Robin.