I wonder how close their masses are to those of the actual coins. If they're putting that much effort forth, I have a bad feeling they have the weights pretty good.
Usually pretty close. The ones I have had in hand were no more than 0.2 grams off, but sometimes the weight difference was within allowable tolerances for genuine coins.
1805 C-3 and C-4 did use the same reverse die. Frankly from just the picture I can't condemn it as a fake. It looks odd but that could just be from the strange coloring.
The source coin for these is a severely scratched genuine 1805 C-4 (if I knew how to add images I would, but it is located on Heritage's site at https://coins.ha.com/itm/half-cents...u/a/1174-7026.s?ic4=ListView-Thumbnail-071515). I own one of these in an NGC slab.
My certified example: https://www.ngccoin.com/certlookup/4687463-001/NGCDetails/ I have notified my contact at NGC and expect the online cert description to change...
Thank you very much to all that contributed to this informative and interesting post. I appreciate all the hard work put into it.
Just another quick update; another example appeared on the bourse at the 2018 EAC Convention in Michigan last week. Matched this one including color and surfaces.
Love your resolve. Your search for further information is keeping us on the edge of our seats. I enjoy hearing your spoken digets