Unknown Asian Coins (4) [Risolto]

Hi,

I am looking to get some help identifying 4 coins from an Asian country. I received these coins as part of a bulk lot I purchased a few months back from someone who had a father stationed in Vietnam in the 60's and 70's. The coins were sent back every so often as presents to a curious boy. When I received the coins, there were Vietnamese Van, Chinese Cash, Korean Mon, and Japanese Sen from the 1800s and early 1900s as were coins from the China Republic, French Indochina, Korea, Japan and Vietnam from the early 1900s to the 1960s.

In this lot were 4 coins that I have yet to identify. Based on the size, I am not certain if they are coins at all. I have searched Numista based on diameter and on weight, and I haven't found a picture that is close. I believe that these 4 coins are similar enough to have them in one post to potentially help identify the group.

Thanks for the assistance,
gmbillman76

Unknown Coin 1
Diameter 46mm
Weight 29.41g


Unknown Coin 2
Diameter 48mm
Weight 26.38g


Unknown Coin 3
Diameter 49mm
Weight 31.65g


Unknown Coin 4
Diameter 50mm
Weight 30.73

unambiguously these are not coins, but amulets, wait for the specialists who can read the inscriptions, I hope experts in this field will also be able to suggest the authenticity and the period of manufacture

Yes. They are not coins but amulets.
They are from Vietnam, just much larger and heavier than their origins.
https://en.numista.com/catalogue/pieces97931.html
https://commons.wikimedia.org/wiki/File:H%C3%A0m_Nghi_Th%C3%B4ng_B%E1%BA%A3o_(%E5%92%B8%E5%AE%9C%E9%80%9A%E5%AF%B6)_-_L%E1%BB%A5c_V%C4%83n_(%E5%85%AD%E6%96%87)_04.png
https://en.numista.com/catalogue/pieces11310.html
https://en.numista.com/catalogue/pieces11312.html

Because of that, maybe the engraver was not very good at Chinese.
The inscriptions on their reverses are very hard to read.
The first and the last one, 河流順[乾] [年]穀豐登, which may be wrong for 河流順暢 五穀豐登, means smooth river and grain harvest.
The 3rd one, 國泰民安 風調雨順, means peace, prosperity and good weather.