Picked up what i beleave is a ground spike earial at the weekend, but have not been able to find any info on its age or youse , the only marking on it are ZA43193 on the large poles and ZA29832 W.T.B MK1/1 on the insulator ,fully built up it is about 10m from insulator to the tip of the earial, I wonder if any one can help with aplication and age .