The first one looks to be a Daoguang Boo-Yuwan type, while the other three look to be a Daoguang Boo-Chiowan type. These were made from 1821 to 1850, and do not appear to be rare. Because I am not good at determining whether or not if coins are fake, I will not make a call on authenticity, but the last two look weird to me.
Many thanks Petrus. When you write .. "If you see a line on the edge, they are cast replica's" what exactly do you mean ? The edge of ? I assume you mean a line around the very edge of the rim ? Cheers Brian.
I assume you mean a line around the very edge of the rim ? Indeed. The real coins are cast too, but the line where the two moulds meet is not so clear. here you see how they were made: http://2.bp.blogspot.com/-x7sQwO5tS.../s1600/1.jpg they are very cheap : https://nl.(Not Allowed).com/item/zhaorui627-Collect-50pcs-Chinese-Copper-Coin-Qing-Dynasty-Antique-Currency-Cash/32354803942.html?spm=2114.48010708.4.23.EHvWk0
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