My wife tells me that I have been studying this coin for too long. She is probably right. But it is not a coin, it is a medal produced by a private mint in Tel-Aviv, Israel, in 1978. Normally such items would be worth their weight in precious metal (silver in this case), but since the artist is so popular, and since only a few thousand pieces have been produced, the value exceeds the precious metal content. These items generally sell retail in the neighborhood of $250 US dollars.
The medal contains 3.25 troy ounces of silver. At the current rate of $32 per troy ounce, that is 3.25 x 32 = $104 in precious metal alone. The price of silver changes every day. Look it up on web sites like kitco.com. A good way to estimate the retail value of this medal is to add $150 to the value of its silver content. If you have a medal to sell, figure a dealer would pay you $30 to $50 over the metal value.
CoinQuest thanks respected eBay seller Menachem Coins and Medals of Israel for use of their photo.
According to DaliAuctionWatch, there is a gold version of this medal. It contains 0.907 troy ounces of gold. At the current $1692 'spot' value of gold, that is 0.907 x 1692 = $1470 in gold value alone. Adding, say, $300 gives an estimate of the gold medal retail value, $1770.