Breyer Seabiscuit's Stablemates Collection 2003 - 2004
Seabiscuit (bay G1 Seabiscuit in middle)
Pumpkin (palomino G1 QH)
War Admiral (dark bay G2 Thoroughbred)

Update: the Seabiscuit shown is actually from a different release
711096 bay with hind stocking from JC Penney 12-piece stablemate set in 1996