Overall length of chain 18cm. There is no hallmark so I don't know if the chain is silver.
Coins - unknown silver content:
[Middle East] 10 Milliemes 1917
[Middle East] unidentified
India Quarter Rupee 1946
[Middle East] unidentified; same denomination as the second on the list
South Africa 3d 1936
Norway 10 ore 1953
Eire 6d 1928
USA 1 dime 1929
Switzerland 10 cents 1944
Ceylon 5 cents 1920