Israel coin variation

Hi all!
Can you help me with this coin with a strange edge ring? I have no idea what it can be. Have you ever seen that variation?

Martin

What is the weight and diameter of this coin?

Looks closest to this one, https://en.numista.com/catalogue/pieces9576.html But your coin has the extra ring on the edge and the reverse styling of "10" is little different. It might be another variety which is not in Numista?

It is this one https://en.numista.com/catalogue/pieces1715.html year 1988. But what about that ring?

error coin

Απόσπασμα1, 5 and 10 Agorot dated 1988, featuring a raised circle just inside the rim. It is most prominent on the 10 Agorot.

look here:
http://israelerrorcoins.hostingsiteforfree.com/misc/index.html

or look here:
http://www.ebay.ca/itm/Israeli-10-Agorot-error-coin-raised-circle-just-inside-rim-/181020608220