Blue slate description
The head, throat, and wattles are red to bluish white. The beak is horn in color; the eyes are brown; and the beard is black. The shanks and toes are pink.
Black turkey description
The beak is black, the wattle is red, changeable to bluish-white, and the shanks and toes are pink in adults. Eye color is dark brown.
Norfolk Black description
The adult Norfolk turkeys (in the U.S.) can have some white tipped feathers with pink toes and shanks. The British poultry Standard of 1951-1971 calls for the Norfolk Black to have black shanks and toes with no white in the feathers.
When breeding Slate to Slate, the results are three different colors, Slate,Self Blue and Black.
If you were to breed the blacks from this together or with another black 100% black poults would be the result.
These black poults have the same genotype as the black spanish and do breed true