This is from the old 1914 American Standard of Perfection:
Sultans.
They have for their most attractive characteristics the novel features of a full crest, muff and beard, combined with vulture hocks and profuse shank and toe feathering. These peculiarities should be most prominent in their form and outlines.
Disqualifications
Beak other than white or pale flesh color; large, red face; absence of beard; absence of vulture-hocks; shanks not feathered down outer sides.
Head: Medium size
Beak: Short, well curved
Nostrils: Large
Eyes: Oval
Comb and Crest: Comb, very small having two spikes, V-shaped. Crest large globular and compact.
Beard: Very full, joining whiskers and extending to crest
Wattles and Ear-Lobes: Wattles, small, round. Ear-lobes, small, round, concealed by crest and whiskers.
Neck: Short, arched, carried well back
Wings: large, carried low
Back: long and straight
Tail: Large, well expanded, rather erect
Breast: Deep and prominent
Body and Fluff: Body, very square, compact, carried low
Legs and Toes: Thighs, very short, well feathered with long vulture hocks; shanks, short, heavily feathered down outer sides; toes, five on each foot,; straight middle and outer toes well feathered
Color of male and female
Beak: Slaty blue (I think this is a mistake?)
Eyes: reddish-bay
Comb and Face: comb bright red. Face, bright redbut covered by whiskers and almost invisible
Wattles and Ear-lobes: Bright red
Shanks and toes: Slaty-blue
Plumage: Web, quill and fluff of feathers in all sections pure white