Need help identifying and valuing Ottoman Empire Coin

Hi. I picked up this necklace at a flea market.  All the coins are about 1mm thick. The large one is 37mm diameter and the small ones are about 17.5 or 18 mm diameter.  I think the large one is an Ottoman Empire coin and I was wondering if anyone could identify the coin(s), let me know if they are real coins, let me know if there is any silver value, or give an estimated value on the entire piece. Any help would be appreciated. Thanks!

The bigger coin looks similar to this one, https://en.numista.com/catalogue/pieces11613.html

Year on your coin : 1222 (29)

The smaller coins seems to be, https://en.numista.com/catalogue/pieces11613.html

I have no idea whether they are real coins or not and what is the value of the bigger one (smaller one seems pretty common).

Looking at the even wear on these coins, I would say that they are real, not to mention the smaller 10 para coins are very common.

the bigger one is 2 kurush of 2.Mahmud.Its year is 1223(AH)
The other three is 10 paras of Muhammed IV(Sultan Reshad) their year 1327 AH.
they have no numismatic value if you break the object.But If you keep it as it is,it is really nice..