Interesting question. To me, it's an item made to represent a style of something made much earlier. If a horn were made in 1914, does that make it "contemporary"? Well, by my definition, if it were made to look like a horn made in 1770 with a pre-revolutionary motif, then I would call it contemporary. But then it's still "old" (antique). In my business, I'm using the term "craft-made" to characterize objects made to look like something they are not. Seems like "contemporary replica" is a term I have picked up from the long rifle crowd.
BTW, just noted that the CLA identifies items for sale "made after 1898" as contemporary.