NOS set of four Fiat 124 84mm pistons for 1800 or 2000 Spiders, Coupes. Box lists as for 1974-1981 if that helps you. Can't tell CR from the appearance. Presumably stock Fiat for the period, smog controlled. New in the box, on the shelf decades at an Alfa shop, Borgo PN 1012-12450; written aftermarket part no. 66-6704. Includes four pistons, pins, pin clips, and original Borgo rings with one-piece cast oil ring and spring expander. Hoping for $200. Can ship in medium PM box for $14. Andrew, Berkeley CA.