The 1988 piedfort (piefort) sheqel was struck, like the rest of the coin in that piefort year set, in pure nickel rather than in copper-nickel alloy as the rest of the piedforts of the type. This is due to the 1988 set struck off-metal similar to the 1980 (lira) set commemorative strike. The coin needs to be split into a separate type - KM-P44 is Krause catalog number. The 1988 also needs to be removed from the referenced page