In 1916 published Felix Mendelsohn produced two series of black and white photographic baseball cards that were designed with blank backs and also offered to a variety of companies with their advertisements on the reverse. The different sets have become extremely popular among type card collectors hobbyists building back runs and set collectors alike. Long underrated the challenge of completion coupled with the added layers of rarity associated with the various backs have increased collector interest particularly as type collecting becomes more popular. In addition to offering a number of different advertising backs from these two issues our Summer 2015 auction includes a large number of Hall of Famers and key cards with the tougher Famous & Barr advertisement on the reverse. The St. Louis clothing retailer was an early customer of Mendelsohn's M101-5 issue and continued with the M101-4 series. Desirable card of the Black Sox "Hap" Felsch just three years prior to his participation in throwing the 1919 World Series. Graded GOOD 30 by SGC the card actually presents very well for the grade but is technically accurate - surface and edge wear easily fall within the constraints of the grade. Population DataSGC Population: 5 total graded 2 at this level 2 higherPSA Population: 1 total graded 0 at this level 1 higher