In this auction combination Van Roy-Philipsen (Balen) offers a select group of high class birds born out:

Child, brother and sister "Sarah". "Sarah" (strain: Lambrechts Geert x De Belser Johan) won 1st National Chateauroux - fastest 9,723b.
Children "791-21" (2nd Nat. Souillac at Comb. Faes-Wils) x "Mare" (1st Nat. Gueret - 2nd fastest 20,569b.)
and so on