1791 Mexican 8 Reales

Based on just what I see - I believe you are looking at a Numismatic Forgery. I would absolutely wait for an accurate weight and edge photos. There is no rush for such a common variety. There will be others with all the answers.

There are two things. First the large break near the F (assayer initial) looks like many similar breaks I have seen in modern centrifugal castings. I know that many people do not question such items because they might be genuine die chips, however, there are more seen on cast copies than on the genuine versions.

Second and far worse is the appearance of wire rim from the same F to the cross on the crown. That feature should not be there on a screw press strike. The dentils on a genuine die are cut full length so there is no mechanism that can produce such a feature (raised arc) on a screw press strike.

I own several of these, & I like your coin! But the easy tell be in the edge, you need some good pics of that. None the less I'm thinking it could be a genuine coin.

It is simply the seam between different parts of the mold in which the casting was made, and is called flashing. You could also get such a rim by striking the coin in a collar. I think the question that should be asked is 'How could such a wire rim exist on a real coin, given the known minting process?' The answer is that it can't - the denticles should continue off the edge of the coin. This is similar to the very early US silver dollars - if there is a wire rim, the coin is fake.

Susuman thank you. Think I understand.

With 3D and everything can't the forgers do a better job? Where is Mark Hofmann?

Don't collect 8Rs any more because of this.

westwoodarms The discussion about the dentils ending before the edge of the coin appears on page 139 of the book.

flippy The 1806 that you posted is a better looking coin. I see no obvious red flags.