Need help to identify 2 Chinese coins

Can someone help to identify 2 Chinese coins, pictured below?   The one on the left has a diameter of 25mm and the one on the right has a diameter of 24mm.  Both are plain with no design on the back.

You know that in any identification of such old coins, there is the pleasure of research, so I will let you search these two old cash 😜

That's how to proceed, let people do their own work and not just give the solution (too easy). Bravo.

Hello

Is the money on the right magnetic ?

Neither coin is magnetic

Hi.

Just a hint:

the 2 pictures are upside down…

I'd need more of a hint than that.   There are too many Chinese coins of the same size and shape.

Ok, one more hint, then:

27 and 28 !

asimov37

Ok, one more hint, then:

27 and 28 !

 

I love that, even I am trying to identify the coin!

I'd need more of a hint than that.   There are too many Chinese coins of the same size and shape.

OK.  I'm guessing the hint of 27 and 28 means 27-28mm.  Is that correct?

Anyway, I searched the Numista catalog for coins from China, round with a square hole, with diameters 27-28.  Here are the only ones that looks close.

Could the one on the right be this:

N#43223

although this one says 28mm and mine is 24 mm

This one has the same character on the bottom that the one on the left has at the top

N#140642

but the other characters don't seem the same.  I don't see any others similar.

Just take a look at the numbers 27 & 28 on the link given by Frenchlover…

I don't think there are any links in Frenchlover's post.  There is a sorting chart, but when I enlarge it, I can barely read the writing.

 Yes, just clicking on it on this page some images are a little larger in general. 

In which case right-click and choose ‘Open link in new tab’ and a much larger picture is shown. 

Here is just top left shown of the larger picture … 

OK.  With ZacUK's suggestion I was able to enlarge and read the Identifier.   I don't read Chinese, but I think the left coin in my photo is

27a Yuan Feng TB seal

The coin on the right looks closest to 

9 Tian Xi Tong Bao

although I am less sure of this

But my big problem is how to move from the identifier to the Numista catalog.  If I search in the Numista catalog for “Yuan Feng” I see only 2 coins, neither of which looks like my coin.  Can someone please help me out?  I seem to be at a dead end.

Emperor names, on the catalog, are concatenated : Yuanyou

But also accessible in two distinct words : Yuan Feng

After looking over the catalog entries, I'm thinking that the coin on the left (in my original photo) is:

N#34504

and the one on the right maybe is this:

N#34494

Can someone more knowledgeable confirm (or deny) whether this is correct?

Thanks.

Or maybe the one on the right is this one:

N#27407

I can't tell

asimov37 already gave you the answer

Asimov 37 said 27 and 28.   If so, the only thing that fits is

27a  YuanFeng TB seal

28b YuanYou TB cursive

Is that correct?

But I'm trying to find the Numista catalog entries.  If I search China coins in the Numista catalog for YuanFeng or YuanYou, there are 121 and 37 results, respectively.   And although I can eliminate many of the possibilities, I find it too hard to positively identify the correct entry.

And Numista doesn't list all versions of these coins so far 😉