Can't comment on the particular gun in question, but the issue with fakes is that eventually when the values of the originals get so high, then the cost of creating the fakes no longer becomes an impediment.
Consider how much the very best custom built 1911's cost. Not even close to a quarter of a million. Now consider how much the very best custom reproduction firearms go for, say a Turnbull Model 1886 at around $10.5K. There's a lot of room for profit there for the forger, which also translates into a lot of time that he can put into research and creation.
I once was a pretty serious militaria collector (and still dabble in the hobby), but even 20-30 years ago the prices of some original uniform artifacts had become so high that near perfect fakes had become quite common. Nowadays, the prices for originals have gone up even more, and the fakers have become so good that even experts will argue endlessly about the originality of this or that artifact. With so many original items having been produced and the constant examples of very common and real incidents of newly found or "discovered" items, even provenance is not something you can hang your hat on.
The rare and highly desirable originals that command the very highest prices are the ones that have been held in collections for the longest and which have at least unbroken, provable chain of ownership that can be traced back to before the appearance of high-quality fakes (that is, back when the prices of the originals didn't match the costs of making high-quality fakes). This has created a two-tier valuation system in the collecting market with the known, unimpeachable originals at the top and "newly discovered" ones at the bottom.
It's possible that such a valuation system could develop here with some selective, highly desirable and collectable 1911's. Unimpeachable collector's provenance setting the standard between those guns fetching the very highest prices and others entering the collector's market at lower valuations simply because they can't be proven (or disproven) as originals.