Viet Nam identification

Hello

Please I need your help for those 2 coins.
I think KM#182 or KM#182b Viet Nam
Diameter 25mm both
Weight 1st 3.31 gr 2nd 3.21 gr
Copper









My question is : what do you think REAL or FAKE ?

Thanks for your help
Michel

I am not an expert on viet coins. but i think both are real. the first one is KM 182 b; 1819, 1 CASH, ruler MINH MANG.

regards,
pjthayil

Thanks Pjthayil