H.C. Mingst Raffon
While hardly a 'rare' sire line (to Skowronek), his own direct male descendants are getting pretty scarce. His daughters, though, produced such well-represented sires as Fame VF and Huckleberry Bey.
Photo taken by H. C. Mingst (my father) during a legion of merit presentation for Raffon's son, Seyn Raffon. Raffon was in his twenties or so at this time.