You mean "walnut comb" right.You can search online for "Silkie ABA standard and compare your birds to the Standard Of Perfection.
A quick review of basic standards "not all inclusive, so read the standard yourself"
5 toes
Dark brown to black eyes.
Rose Comb
Color is pure or matches the standard
wings not drooping
Feet feathering extends to the middle toe
No red in the comb. It should be dark mulberry color

I agree that the black is not partridge but black leaking gold. I like the one that appears to be blue partridge which is a project color but can be shown AOV (all other varieties).