I have found the CD 102 Diamond pony with the single diamond on the front skirt and a backwards number on the rear skirt in many colors. These are two cobalt Diamond ponies with the backward skirt numbers. The Diamond pony in cobalt is the same color as the Mulford & Biddle Cobalt CD 735 threadless insulator. Mark Lauckner called these Vivid Blue in his Field Guide. I know of only six of these. If you have one of the cobalts and I have not contacted you for my study please email me directly.