Superman’s base is a ToyBiz Archangel, the head is a Fantastic Four Reed Richards, his cape is from a Superman Steel, His belt and buckle are made from various plastic pieces and his boots were modified with Milliput. The one detail on this custom was to make sure the ‘S’ insignia on his chest was that of the Golden Age Superman because it is different than that of the current Superman so after a bit of research I settled on the Superman ‘S’ Alex Ross depicted on a painting of the JSA.  there is even a yellow one on the back of his cape as well.