Silverudd Blue (Isbar) have a single straight comb. Red leakage is seen with the second import birds and I would weed it out if I was planning on breeding SB. This is a picture of one of my roosters who is breeder quality. He is a medium size bird with a straight comb, which is on the large size in 1st import (not leghorn large, but bigger than second import). He has black eyes and black legs. and no red. This guy is a blue Silverudd Blue. He has silver markings, no gold.