Watch out for fakes

Hello I have just seen that a lot of members seem to have some of the rarest coins, but exactly with those rare coins that I will post below you should be extra careful before buying them and always ask the seller for the weight of the coin.
If you already happen to have one of those coins in your collection you should check again if your coin has the correct weight as most of these coins being sold are fakes.
I was surprised to see the Numista rarity guide for example on the US trade dollar which is 70!
Most fakes are recognizable but some are very well made, and have the same or nearly the same weight as the original coin. Two examples I know of are the Tallero coin of Eritrea under Italian reign, and the 5 lire coin from Umberto 1.
https://en.numista.com/catalogue/pieces16466.html
https://en.numista.com/catalogue/pieces19047.html
https://en.numista.com/catalogue/pieces21763.html
https://en.numista.com/catalogue/pieces16006.html
https://en.numista.com/catalogue/pieces18307.html
https://en.numista.com/catalogue/pieces21562.html
https://en.numista.com/catalogue/pieces19516.html
On some of these coins you'll see large differences in weight, such as for the 1918 tallero of Eritrea which as a fake weighs 25 grammes and in original 28.5 grammes.

On these too it seems a lot of users have fakes considering the value of the coins.
At least worth 1000 dollars in condition G
https://en.numista.com/catalogue/pieces10355.html
A lot of fakes from this one too
https://en.numista.com/catalogue/pieces17825.html

You and I are clearly thinking along the same lines today:

https://en.numista.com/forum/topic12842.html

 

Saving up for a Yuan Shikai. Not rare over here, just expensive.

This also has many fakes.
https://en.numista.com/catalogue/pieces5742.html

Quote: fliegendehollanderSaving up for a Yuan Shikai. Not rare over here, just expensive.

It's not rare anywhere,

It's just so commonly faked.

I agree that fakes are becoming very common.

and stuff like this
https://en.numista.com/forum/topic12538.html

  Also I have looked up valuable and rare coins for swap and many people have in the notes section, "FAKE"
so this skews the Numista Rarity scale.

How about putting up a whole new coin category or "country" where we can collect all the known fake coinage? I for one would love to know exactly which coins to look out for, and what they look like.

Quote: hagglundHow about putting up a whole new coin category or "country" where we can collect all the known fake coinage? I for one would love to know exactly which coins to look out for, and what they look like.

Sounds like a lot of work for someone, but it would be great if it could be done.

Quote: hagglundHow about putting up a whole new coin category or "country" where we can collect all the known fake coinage? I for one would love to know exactly which coins to look out for, and what they look like.

Too many new coins!

There would just be way too much work on Numista if new fakes were added, since there are so many "varieties." What would make sense is a Numisdoc on fake coins. I am in the process of writing one about Chinese fakes, both modern and contemporary.

Here's a good example of a couple of fakes.

The top left is a coin that was only struck in gold, so it's probably a reproduction in silver.

The top right looks like a fake to me.

The bottom ones are probably real.

http://www.ebay.com/itm/Mixed-Silver-Coin-LOT-from-Europe-/151005684250?nma=true&si=My6eNU1TB4fXcrGuimHFQYilNG0%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557