Semi-barbarous or unofficial coins are often extremely difficult to date due to their confusing and illegible lettering. On this coin however one can clearly see the letters BP perfectly formed in left field, this combination of letters could be mistaken as Aradian year 102 (158-157 B.C). But unfortunately year 102 as already been allotted to official coins with PB read from left to right; ref Duyrat 2005 2871-2882 on page 79. Due to the coin being a fourreé the chances of correctly dating it will be remote.
One noticeable irregularity on the official coins of this series is that the era dates are read right to left up to year 99 and then left to right from year 100-105. From year 106 it then reverts back, i’m sure there´s a rational explanation for this.
For the coins attribution please follow provided link.
Coins Of The Southern Levant 