Thoroughbred Lying Foal, Black
This little guy was only a two-year release back in 1975 & 1976. He was only sold in a bubble pack with a standing foal of the same color. He is solid black with no white markings.
This fellow is Near Mint with two pinpoint white specks: one on his left knee and the other under his chin. Both would be incredibly easy to touch up.
Breyer Model #5701