Carrera y Carrera Solid 18k Yellow Gold Elegant Hand Pin with Natural White Diamond I am not certain this is Carrera y Carrera because in the time this piece would have been made, Carrera y Carrera was not stamping their pieces. However, it is stamped “750” (aka the European way of saying 18k gold). This hand elegantly dangles one single white diamond in the most beautiful of ways. It is solid 18k yellow gold with one natural white diamond (great clarity, great color). This is a vintage piece in good condition, no backing PRICE IS FIRM; price comparisons in the last photos