Not the least to consider is the standing challenge made on this site some years ago which simply says "show me a counterfeit razor". No one has ever answered this challenge successfully. People suspect but it never pans out.
So the likelihood of it being a knockoff is very slim indeed.
To be honest, I was 90% sure that this was a set of gen scales on an unknown blade. I just didn't think a major Spanish razor would put the US motto on it's product. I did not consider promotional or special orders.