Featured Age of coins on Afghan necklace, Bactrian glass.

The necklace is made of glass seed beads dating from the Greco-Bactrian period, from 250 to 125 BC.
The green glass tube beads and central bead were made later, from fragments of ancient Bactrian glass.
The carnelian beads are contemporary with the assembly of the necklace, ca 1980s.
The original clasp was missing, it has been replaced with a sterling silver clasp.
My question is about the coins, diameter ca 10 - 13 mm, are they Ghaznavid period, later? I have seen small antique Turkish coins like these, just as badly struck, maybe they ended up in Afghanistan through trade, travel?
Any help is welcome, @daveydempsey ?

 

Thanks Davey, very useful information. I had no idea where to start, this gives me something to research.
Yes, I knew the numismatic value was zilch, they are staying on the necklace. Judging from the nice rounded wear on the holes, they were pierced a long time ago. They probably came from an older necklace.

 

Not a clue here but very cool!

 

@daveydempsey, you were right (of course). I have whittled it down to Afghan rupees, 18th century or slightly earlier.
I now have very round eyes with Arabic script from studying all the coins.
Thanks again.

 

It's fascinating, @Any Jewelry , to read your research on the dates of the components of this necklace. And assembled in the 1980s? Interesting!

 

Thanks @Figtree3 . I like digging in historical data. And I like the link jewellery and components have to past periods. Afghanistan is great for that kind of thing, at the crossroads of many cultures for thousands of years.