Absolutely, I worked in the antique trade for many years, and lost count how many fake and reproduction items that I saw passed off as being legit pieces.
The same thing happens in the fish trade every day. This is precisely why I am vehemently opposed to sellers who misrepresent their fish with photoshopped images, or use hormones or synthetic color enhancing agents in the water and/or food to artificially enhance the true color of a fish.