8 Reales 1770 Mf Real Or Fake?

Unfortunately I can't take any further pictures because I don't have the coin with me.It's back home along with the rest of the coins and I only go there twice a year.I'm not sure if that is actually a strip of silver being applied to it, but I remember the edge was right excepting an ex mount mark at 12 o'clock.

If the odd extra metal areas at 3:30 and 9:30 on the shield side are what you're looking at... that's not what that effect is.

To be honest, not sure exactly what that is... As jfransch threw out there, something like a strip to hide a seam (swamperbob has of course discussed this)... However, this kind of effect (to varying degrees) shows up occasionally on what seem to be perfectly genuine pillar 8R. Maybe I'm making this up, but I thought I remember reading something from either Bob or John L. (or elsewhere?) about a bit of extraneous metal getting upset during the edge application and then getting flapped over on itself during obv/rev strike?

I will also guess that the edge overlaps are going to be right around those spots.

Whatever the case, compare a few other 1770 examples with similar effects (all generally look OK, from good sources):

John, look at your piece's photo (shield side). Actually a slight bit of the same effect going on at the ordinal (as circled).

Are the edge overlaps at/near that spot and correspondingly across the coin?

thanks for the info. so much to learn about Reales series

I'm seeing these all as variations of the same effect... whatever it is. I would guess it's related to the edging process.

Here, for example - just in one small spot, and less overt, but it's clear this is the same thing:
https://coins.ha.com/itm/mexico/wor...bnail-071515

For some reason can't find the image of the coin itself, but did fine a close up of the effect.

Piece that happened to be up tonight:
https://www.ebay.com/itm/1768-Mexic...173159281636

The edge here is common on genuine 8 reales where the blanking press has some wear. The effect is caused by a fin of metal attached to the blank. If the blank is the correct weight the person checking the weight does not remove the fin. When this blank with the fin is run through the edging mill it is folded over one of the coins faces. The next step is striking in an open sided screw press. This drives the remaining fin into the face of the coin imparting the design with it. In some cases, the fin is short in other cases longer. Often it remains in place, but sometimes it partially comes away from the coin and breaks off. All of the genuine coins originate in this fashion.

All of the photos illustrate coins made using the correct manufacturing techniques.

When I speak of a Contemporary Counterfeit edged with a silver ribbon, I am referring to the process developed by Matthew Boulton about 1785 which applies a strip of silver and the edge design in one operation.

Here is a picture of a counterfeit that uses the silver ribbon edge. First the whole coin to show the seam runs around the perimeter on both faces;



Here is a close up shot of the date area. The seam is visible 360 degrees when examined with a microscope. From a distance, as in the picture above, the seam is most visible where small chips have begun to fall away.