The Cameos had a fender emblem that was 3124(If I remember) but was definitely not 3100. Usually a fake Cameo will have the bedsides and tailgate but won't have the factory rear bumper that has the center that moves to let the spare fit in under the bed. The headliner was perforated and the interior color coded to the exterior rather than the standard interior color. I'm quoting this from memories of a 57 but the 56 should be very similar. Hope this helps.
