There is a standard in Russia- this is information from a Russian website. Tried to translate as best as I could. Hope this is helpful
Cocks: Head : medium-sized, round.
Crest : Narrow, as if compressed from sides, and slightly tilted forward, but does not touch the beak, feathers pointing upwards and compact. Does not interfere with vision Beak : almost straight, horn color, quite thin, with high nostrils
Comb: horns with two or more points
Wattles: very small Eyes :. Brownish-red to almost black Ear lobe : small, any color Beard : large, very thick, close to ear lobe. Wedge-shaped, strongly developed.
Face : red Chest : Full, rounded Back : wide and flat Wings: medium sized, broad.
Tail : medium-sized, full, keeps almost straight up, but not over the back Legs : Short, very richly feathered. bluish to greenish gray. Four or five toes all feathered
Hens are the same except for virtually no wattles and the crest is wider, fuller and rounder
Egg production : 150-170 eggs per year, shell - from white to cream-colored, egg weight 1.6-1.8 oz Disqualifications: . Lacks crest, beard, crest prevents vision, legs that are not densely feathered Bodyweight : 3.3-5 lbs rooster, hens 2.5-3.3 lbs Colors: gold, silver, black, white, black and white
This art work is from a Russian Artist I know, Sasha Musin, please give him credit. His work is beautiful and accurate. He is part of a group that knows the breed and its history. PM me and I will try to help. I have observed them to be flighty and a bit gamey but that maybe due to how they are raised. I have one generation that is handled and fine and another that is not. Russians tell me they are very tame. They are small but lay a large egg for their size. I can not speak to broody habits but will ask my friends in Russia who keep them.