This pullet is the product of crossing two lines followed by close breeding for two generations. Her grandsire himself was a cross between a battle cross cock and a brood hen from one of the lines used to create the grandsire. The great granddam looks most like a Mug which is the source of the patrterns in the feathers on the back. The great grandsire side likely had what is called recessive wheaten that was masked by something the the great granddam did not carry. The recessive wheaton makes for the light base coloration. She represents an allelic combination I have not seen for 30 years.
She does not represent core lines of interest but is being used to produce chicks out of season for work. Normally I do not produce for hatching eggs this time of year with games so do nutrition not optimal for such a low number of hens in lay. When so pushed with current diet I get these monster combs that shrink back down to normal with proper diet or free-range foraging depending on situation. She is a little rough in feather from display cock kept with her.
Getting a little help from below on this pic.