Quite a few builders have gone all out creating exact replicas of the early Harleys, only problem is the machines are not very practical to ride. Copperhead is not an exact replica but has a strong family resemblance to a 1917 Harley Davidson, though it began life as a 1979 Sportster. In other words, you have the antique look with a practical ride, qualities that remind me a lot of another bike we've mentioned here, the Warboy 883 XWL. Anyone familiar with bikes will see the modern parts, like disc brakes, but the copper and brass everywhere plus the proper paint colors give it a really antique feel.
The wheels and tires are modern, but look right. Fluid levels are easy to check with sight glasses, there's a copper headlight enclosure, braided plug wires, it's a well done custom. The video below shows it works like a modern bike, sounds like a Sportster and looks like it was just restored after being discovered in some long forgotten barn.
You could roll up to any antique bike show and fit right in. This looks like it would be a hoot to ride. I like it.
It's for sale on eBay.