8 Reales 1765 And 1747 Mexico Mint

In my opinion, none of them is genuine. Those rims are terrible, and wear makes no sense, edges are wasted and reliefs and fields are "perfect". I'm sorry. I hope they weren't expensive for you.

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Creo que ninguna de los dos son buenas, las gráfilas cantan mucho. El desgaste tampoco tiene sentido, esos campos y relieves tan limpios, junto con el canto super desgastado... parecen las dos salidas del mismo taller. Lo siento, espero que no te costasen muy caras

Again, the dentils is all you need to look at... they are HORRIBLE/nonexistent with multiple seams visible.

These coins are obviously not struck and are of the Chinese cast junk variety.

Compare your 1747 example to this one and the difference become clearly visible.

I can see he is Spanish, so I will translate my answer to Spanish, English is not our mother language, and I think he will understand me better. If there is any problem with it, please edit my post :)

It is so dangerous to buy a pillar dollar outside well reputated shops. On ebay threre are more fakes than authentic ones, and the authenitcs are (almost) all of them reselled from auctions. In my opinion, is worthy to pay a bit more, but buy them on an auction, almost all spanish auctions houses gives you lifetime guarantee of authenticity and coins are authenicated by a proffesional. You can search on Aureo&Calicó, Cayón or Soler y Llach, with a bit of pacience, is not difficult to find some of them really cheap.

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Los columnarios son unas monedas muy peligrosas. En ebay hay más falsos que buenos... y los buenos son (casi) todos revendidos de subastas. En mi opinión merece la pena gastarse un poquito más de pasta y pillarlos en una casa de subastas, que te dan garantía de por vida, los autentifican ellos y tienes una factura de compra, que arriesgarse a comprarlos en cualquier sitio. Mira las subastas de Áureo & Calicó, Cayón o Soler y Llach, todos los meses tienes muchos a la venta. Con un poco de paciencia se consiguen a muy buenos precios.

Saludos!

txabs - you are exactly correct. I love hunting for coins in Spanish auctions and have purchased from each of the ones you mentioned multiple times with great success, I would also add vico to the list. There are very reasonable prices at times but one needs to be careful, most of the coins sold are problem coins (cleaned, polished, tooled, etc).

I have a few duros I purchased from a recent Calico auction which I'll share in the crown thread once I get them - I know you're a fellow collector.

Sure, there is a few more companies which are high reputation, Jesus Vico, Tauler&Fau or Ibercoin are also good choices. I didn't mention Vico because they are a bit more specialiced on antique coins, and their starting prices on most modern coins are a bit high... but they are so serious too. Of course some of the coins are problem coins, but all of auction houses give you the right to return the items if once you get it at home, you don't like it, or have any issued not mentioned on description. This feature makes you buy with total confidence.

Waiting to see that Aureo duros :).