Coins from Asia (Vietnam?) - help with identification

Hello,

I have 4 coins from Asia and I can't identify them. Can you help me?
They haven't symbols on reverse.

Please read this and come back afterwards

https://en.numista.com/forum/forum12.html

I do not recognize the second one, but the other three are all types from China. From left to right:

1) Zhenghe Tongbao (Clerical script)
3) Daguan Tongbao (Slender Gold script)
4) Zhenghe Tongbao (Seal script)

Assuming all are of 1 Cash sizes, those would correspond to the following pages:
https://en.numista.com/catalogue/pieces20606.html
https://en.numista.com/catalogue/pieces27436.html
https://en.numista.com/catalogue/pieces61311.html

Цитата: "Sjoelund"​Please read this and come back afterwards
​
​https://en.numista.com/forum/forum12.html

​What - why link to the forum it was already posted in?

2) May be Canh Hung Tuyen bao, Toda#123

Цитата: "ZacUK"​

Цитата: "Sjoelund"​Please read this and come back afterwards
​​
​​https://en.numista.com/forum/forum12.html

​​What - why link to the forum it was already posted in?

​The link is: https://en.numista.com/forum/topic71935.html, sorry

Thanks for your help. I think my problem is solved.

I would suggest you take them to a dealer and have them checked for authenticity. The dirt on coins 2 and 4 looks familiar to me. I took mine to my local dealer and with his eye he could tell mine were fakes. I had a couple real ones but the bulk of them were fakes. The dirt is a give away to me.