Turtle, they are not coins, nor are they forgeries per say. These are both 'amulets'. I do not believe that these items were produced for the intent of deceit. The authentic coin is silver, but these amulets are either bronze or brass, I do not recall which.
Rama V is revered to such high degree, that to possess a piece bearing his resemblance is a good thing, to be carried with you everywhere, in your purse or pocket or around your neck (for luck).
The first item shown is a very good likeness of a real coin dated 1908, the last coin struck before his death in 1910.
The second item is also an amulet, but not patterned after an authentic coin.
What to look for (if you want to purchase the real silver coin) is this on the obverse:
Notice the medals on his chest; the second medal will hang the lowest.
Notice the collar on his tunic, it is very heavily embroidered.
Notice the under collar below his tunic, it encircles the neck, not just partially.
Notice his necklace and medallion, it is very ornate.
On the reverse there will be the number 127 (in Thai) under the elephant.
Below is the real thing:

