Jgreenhead's I've seen before a number of times and it was referred to as blonde or buff since chickens get the same genetic condition and are described that way. Between hunting parties of friends and families over the years I've maybe seen 6,000 pheasants harvested and maybe 5-6 of these had this color variant. Personally, I would mount it only if I already had a mount with a really long tailfeather as it is pretty cool/neat.
Chestle's has a small amount of piebald which is quite a bit rarer but not unheard of. Piebalds are hunted in my circle by SD locals as hard as trophy bucks- as in all rumors are tracked down and all other operations are halted if a good lead is known. Our family has one mounted that is about 80% piebald. That was the second one taken in our circle, third ever seen by our own eyes out of the 10,000s of birds seen in the wild over 40 years. Just a known genetic defect when you get large bird numbers in a spot that isn't hunted heavily and they survive 2-3 years with enough chance to inbreed.