Dating israeli coins
Don't know if the link below will work but I recently posted some files to help date coins with unusual number characters/date systems (including Israel).
Hope this helps. Your problem arises because the Israeli number system uses letters of the alphabet to denote numbers on coins.
The Israel Antiquities Authority said Wednesday that the find consists of 2,000 coins, weighing about 6 kilograms (13 pounds).
Kobi Sharvit, director of the authority's marine archaeology unit, says the coins were likely swept up in recent storms near the Israeli port city of Caesarea.
In order to specify it is a number, a (״) is added just before the last letter (reading right to left). With all numbers smaller than 1000, the total value is the sum of the numerals, the letters/numerals being typed in decreasing order, right to left.
A picture shows one of the gold coins recently found on the seabed off Israel's Mediterranean coast, in the Israeli town of Caesarea, on February 18, 2015.
Scuba divers have discovered the largest trove of gold coins ever found off Israel's Mediterranean coast -- about 2,000 pieces dating back more than 1,000 years, the country's antiquities authority said.
Here's an illustration of these two numerals as they appear on circulated aluminium coins (a 1 agorah 1975 and 10 agorot 1978): I've found a better means of discerning them, particularly for these aluminium coins from the 1970s, is the location of the tiny "serif" where those two strokes meet - for heh (5), it's at the side, for cheth (8), it's at the top.
There are 22 consonant letters in the Hebrew alphabet and these are also used to represent numbers. If you get a chart of the Hebrew alphabet you will be able to translate the date.